Add default properties to link buttons and remove redundant settings (#8151)

* Add font-size: inherit to link button

Remove redundant font-size settings

_FeedbackDialog.scss
_GenericFeatureFeedbackDialog.scss
_Login.scss
_NewRoomIntro.scss
_NotificationSettingsTab.scss
_PinnedEventTile.scss
_PreferencesUserSettingsTab.scss
_SpaceCreateMenu.scss
_ToastContainer.scss
_UserMenu.scss

Specify font-size
- _ProfileSettings.scss
- _SpaceBasicSettings.scss
- _SpaceSettingsDialog.scss

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Add line-height: inherit to link button

Remove redundant setting
- _GenericFeatureFeedbackDialog.scss
- _PinnedEventTile.scss
- _SpaceCreateMenu.scss

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Add font-weight: normal to link button

Remove redundant setting
- _SpotlightDialog.scss
- _UserMenu.scss

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Dedupe _link and _link_inline

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Set inline to "link_inline"

Treat the button as its name indicates.
For elements that should not be inlined, "link" should be used.

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

res/css/views/dialogs/_FeedbackDialog.scss

@@ -58,10 +58,6 @@ limitations under the License.
             line-height: $font-15px;
         }
 
-        .mx_AccessibleButton_kind_link {
-            font-size: inherit;
-        }
-
         a, .mx_AccessibleButton_kind_link {
             color: $accent;
             text-decoration: underline;

res/css/views/dialogs/_GenericFeatureFeedbackDialog.scss

@@ -21,9 +21,4 @@ limitations under the License.
         line-height: $font-20px;
         margin-bottom: 24px;
     }
-
-    .mx_AccessibleButton_kind_link {
-        font-size: inherit;
-        line-height: inherit;
-    }
 }

res/css/views/dialogs/_SpaceSettingsDialog.scss

@@ -77,6 +77,7 @@ limitations under the License.
 
     .mx_AccessibleButton_hasKind {
         &.mx_AccessibleButton_kind_link {
+            font-size: $font-14px;
             margin: 7px 18px;
 
             &.mx_SettingsTab_showAdvanced {

res/css/views/dialogs/_SpotlightDialog.scss

@@ -241,7 +241,6 @@ limitations under the License.
         .mx_SpotlightDialog_recentSearches > h4 > .mx_AccessibleButton_kind_link {
             padding: 0;
             float: right;
-            font-weight: normal;
             font-size: $font-12px;
             line-height: $font-15px;
             color: $secondary-content;