Fix dropdown button size for picture-in-picture CallView (#8680)

Author: luixxiul

res/css/views/voip/CallView/_CallViewButtons.scss

@@ -24,6 +24,8 @@ limitations under the License.
 }
 
 .mx_CallViewButtons {
+    --CallViewButtons_dropdownButton-size: 16px;
+
     position: absolute;
     display: flex;
     justify-content: center;
@@ -65,8 +67,8 @@ limitations under the License.
         }
 
         &.mx_CallViewButtons_dropdownButton {
-            width: 16px;
-            height: 16px;
+            width: var(--CallViewButtons_dropdownButton-size);
+            height: var(--CallViewButtons_dropdownButton-size);
 
             position: absolute;
             right: 0;

res/css/views/voip/_CallView.scss

@@ -165,6 +165,11 @@ limitations under the License.
                 width: 34px;
                 height: 34px;
 
+                &.mx_CallViewButtons_dropdownButton {
+                    width: var(--CallViewButtons_dropdownButton-size);
+                    height: var(--CallViewButtons_dropdownButton-size);
+                }
+
                 &::before {
                     width: 22px;
                     height: 22px;