Redesign "failed to send messages" status bar

res/css/structures/_RoomStatusBar.scss

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-.mx_RoomStatusBar {
+.mx_RoomStatusBar:not(.mx_RoomStatusBar_unsentMessages) {
     margin-left: 65px;
     min-height: 50px;
 }
@@ -68,6 +68,99 @@ limitations under the License.
     min-height: 58px;
 }
 
+.mx_RoomStatusBar_unsentMessages {
+    > div[role="alert"] {
+        // cheat some basic alignment
+        display: flex;
+        align-items: center;
+        min-height: 70px;
+        margin: 12px;
+        padding-left: 16px;
+        background-color: $header-panel-bg-color;
+        border-radius: 4px;
+    }
+
+    .mx_RoomStatusBar_unsentBadge {
+        margin-right: 12px;
+
+        .mx_NotificationBadge {
+            // Override sizing from the default badge
+            width: 24px !important;
+            height: 24px !important;
+            border-radius: 24px !important;
+
+            .mx_NotificationBadge_count {
+                font-size: $font-16px !important; // override default
+            }
+        }
+    }
+
+    .mx_RoomStatusBar_unsentTitle {
+        color: $warning-color;
+        font-size: $font-15px;
+    }
+
+    .mx_RoomStatusBar_unsentDescription {
+        font-size: $font-12px;
+    }
+
+    .mx_RoomStatusBar_unsentButtonBar {
+        flex-grow: 1;
+        text-align: right;
+        margin-right: 22px;
+        color: $muted-fg-color;
+
+        .mx_AccessibleButton {
+            padding: 5px 10px;
+            padding-left: 28px; // 16px for the icon, 2px margin to text, 10px regular padding
+            display: inline-block;
+            position: relative;
+
+            &:nth-child(2) {
+                border-left: 1px solid $input-darker-bg-color;
+            }
+
+            &::before {
+                content: '';
+                position: absolute;
+                left: 10px; // inset for regular button padding
+                background-color: $muted-fg-color;
+                mask-repeat: no-repeat;
+                mask-position: center;
+                mask-size: contain;
+            }
+
+            &.mx_RoomStatusBar_unsentCancelAllBtn::before {
+                mask-image: url('$(res)/img/element-icons/trashcan.svg');
+                width: 12px;
+                height: 16px;
+                top: calc(50% - 8px); // text sizes are dynamic
+            }
+
+            &.mx_RoomStatusBar_unsentResendAllBtn {
+                padding-left: 34px; // 28px from above, but +6px to account for the wider icon
+
+                &::before {
+                    mask-image: url('$(res)/img/element-icons/retry.svg');
+                    width: 18px;
+                    height: 18px;
+                    top: calc(50% - 9px); // text sizes are dynamic
+                }
+            }
+        }
+
+        .mx_InlineSpinner {
+            vertical-align: middle;
+            margin-right: 5px;
+            top: 1px; // just to help the vertical alignment be slightly better
+
+            & + span {
+                margin-right: 10px; // same margin/padding as the rightmost button
+            }
+        }
+    }
+}
+
 .mx_RoomStatusBar_connectionLostBar img {
     padding-left: 10px;
     padding-right: 10px;
@@ -103,7 +196,7 @@ limitations under the License.
 }
 
 .mx_MatrixChat_useCompactLayout {
-    .mx_RoomStatusBar {
+    .mx_RoomStatusBar:not(.mx_RoomStatusBar_unsentMessages) {
         min-height: 40px;
     }
 

res/img/element-icons/retry.svg

@@ -0,0 +1,3 @@
+<svg width="18" height="19" viewBox="0 0 18 19" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path fill-rule="evenodd" clip-rule="evenodd" d="M4.58365 3.90848C5.79757 2.94852 7.33285 2.375 9 2.375C12.6817 2.375 15.7112 5.1675 16.086 8.75H17.6314C17.9253 8.75 18.1006 9.07792 17.9376 9.32274L15.6812 12.711C15.5355 12.9297 15.2145 12.9297 15.0688 12.711L12.8124 9.32274C12.6494 9.07792 12.8247 8.75 13.1186 8.75H14.5754C14.2088 5.99798 11.8523 3.875 9 3.875C7.68247 3.875 6.4726 4.32705 5.51407 5.08504C5.45221 5.13396 5.39899 5.17326 5.36001 5.20114C5.34047 5.21513 5.32433 5.22637 5.31229 5.23463L5.29733 5.24482L5.29227 5.24821L5.29037 5.24948L5.28958 5.25L5.28923 5.25023L5.28906 5.25034L5.28898 5.2504L4.875 4.625L5.2889 5.25045C4.94347 5.47904 4.47814 5.38433 4.24955 5.0389C4.02136 4.69408 4.11534 4.22977 4.45929 4.00075L4.4633 3.99802C4.46789 3.99487 4.47605 3.9892 4.48719 3.98123C4.5096 3.9652 4.5433 3.94038 4.58365 3.90848ZM3.42456 10.25H4.88138C5.1753 10.25 5.35061 9.92208 5.18758 9.67726L2.93119 6.28905C2.78553 6.07032 2.46447 6.07032 2.31881 6.28905L0.0624241 9.67726C-0.100613 9.92207 0.0746987 10.25 0.368618 10.25H1.914C2.28878 13.8325 5.31828 16.625 9 16.625C10.7415 16.625 12.3388 15.9992 13.5764 14.9611C13.8938 14.6949 13.9353 14.2219 13.6691 13.9045C13.4029 13.5872 12.9298 13.5457 12.6125 13.8119C11.6349 14.6319 10.376 15.125 9 15.125C6.14769 15.125 3.79123 13.002 3.42456 10.25Z" fill="#737D8C"/>
+</svg>

res/img/element-icons/trashcan.svg

@@ -0,0 +1,3 @@
+<svg width="12" height="17" viewBox="0 0 12 17" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M0.857143 14.5C0.857143 15.4491 1.62857 16.5 2.57143 16.5H9.42857C10.3714 16.5 11.1429 15.2542 11.1429 14.3051V5.67692C11.1429 4.72781 10.3714 3.95128 9.42857 3.95128H2.57143C1.62857 3.95128 0.857143 4.72781 0.857143 5.67692V14.5ZM11.1429 1.36282H9L8.39143 0.750218C8.23714 0.59491 8.01429 0.5 7.79143 0.5H4.20857C3.98571 0.5 3.76286 0.59491 3.60857 0.750218L3 1.36282H0.857143C0.385714 1.36282 0 1.75109 0 2.22564C0 2.70019 0.385714 3.08846 0.857143 3.08846H11.1429C11.6143 3.08846 12 2.70019 12 2.22564C12 1.75109 11.6143 1.36282 11.1429 1.36282Z" fill="#737D8C"/>
+</svg>