Threads appearance tweaks (#8233)

Author: Germain

res/css/views/right_panel/_ThreadPanel.scss

@@ -20,6 +20,10 @@ limitations under the License.
     height: 100px;
     overflow: visible;
 
+    &.mx_BaseCard {
+        padding-right: 0;
+    }
+
     .mx_BaseCard_header {
         margin-bottom: 12px;
 
@@ -128,6 +132,7 @@ limitations under the License.
     .mx_RoomView_MessageList {
         padding-left: 12px;
         padding-right: 0;
+        content-visibility: visible;
     }
 
     .mx_EventTile,
@@ -236,6 +241,7 @@ limitations under the License.
         gap: 4px;
         position: relative;
         top: 2px;
+        padding-right: 8px;
 
         .mx_AccessibleButton_kind_link_inline {
             color: $secondary-content;