Disallow invalid inline style comments in stylesheets (#9099)

res/css/views/settings/_ImageSizePanel.pcss

@@ -19,10 +19,10 @@ limitations under the License.
 
     .mx_ImageSizePanel_radios {
         display: flex;
-        margin-top: 16px; // move away from header a bit
+        margin-top: 16px; /* move away from header a bit */
 
         > label {
-            margin-right: 68px; // keep the boxes separate
+            margin-right: 68px; /* keep the boxes separate */
             cursor: pointer;
         }
 
@@ -33,7 +33,7 @@ limitations under the License.
             mask-position: center;
             width: 221px;
             height: 148px;
-            margin-bottom: 14px; // move radio button away from bottom edge a bit
+            margin-bottom: 14px; /* move radio button away from bottom edge a bit */
 
             &.mx_ImageSizePanel_sizeDefault {
                 mask: url("$(res)/img/element-icons/settings/img-size-normal.svg");