Allow creating knock rooms (#11182)

Signed-off-by: Charly Nguyen <charly.nguyen@nordeck.net>

res/css/views/dialogs/_JoinRuleDropdown.pcss

@@ -44,6 +44,10 @@ limitations under the License.
                 mask-position: center;
                 background-color: $secondary-content;
             }
+
+            &.mx_JoinRuleDropdown_knock::before {
+                content: normal;
+            }
         }
     }
 
@@ -63,4 +67,11 @@ limitations under the License.
         mask-image: url("$(res)/img/element-icons/group-members.svg");
         mask-size: contain;
     }
+
+    .mx_JoinRuleDropdown_icon {
+        color: $secondary-content;
+        position: absolute;
+        left: 6px;
+        top: 8px;
+    }
 }

res/img/element-icons/ask-to-join.svg

@@ -0,0 +1 @@
+<svg width="12" height="16" xmlns="http://www.w3.org/2000/svg"><path d="M6.806 16c-1.211 0-2.242-.336-3.091-1.008-.85-.673-1.458-1.48-1.826-2.425L.217 8.25c-.206-.533-.265-.93-.179-1.192.087-.26.282-.391.585-.391.4 0 .714.12.941.358.227.239.411.542.552.908l.714 1.884c.01.033.097.094.26.183h.227V2.2c0-.233.084-.436.251-.608a.8.8 0 011.177 0 .858.858 0 01.244.608v5.467c0 .089.032.166.097.233a.307.307 0 00.454 0 .324.324 0 00.098-.233v-6.8c0-.234.084-.436.251-.609A.8.8 0 016.482 0a.8.8 0 01.592.258.843.843 0 01.252.609v6.8c0 .089.032.166.097.233a.307.307 0 00.455 0 .324.324 0 00.097-.233v-5.8c0-.234.084-.436.252-.609A.8.8 0 018.819 1a.8.8 0 01.592.258.843.843 0 01.252.609v5.8c0 .089.032.166.097.233a.307.307 0 00.455 0 .324.324 0 00.097-.233v-3.8c0-.234.084-.436.252-.609A.8.8 0 0111.156 3a.8.8 0 01.592.258.843.843 0 01.252.609v6.966c0 1.523-.495 2.764-1.485 3.725C9.525 15.52 8.289 16 6.806 16z" fill="currentColor"/></svg>