Add resize CallViewForRoom CSS

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

res/css/views/voip/_CallViewForRoom.scss

@@ -0,0 +1,46 @@
+/*
+Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_CallViewForRoom {
+    overflow: hidden;
+
+    .mx_CallViewForRoom_ResizeWrapper {
+        display: flex;
+        margin-bottom: 8px;
+
+        &:hover .mx_CallViewForRoom_ResizeHandle {
+            // Need to use important to override element style attributes
+            // set by re-resizable
+            width: 100% !important;
+
+            display: flex;
+            justify-content: center;
+
+            &::after {
+                content: '';
+                margin-top: 3px;
+
+                border-radius: 4px;
+
+                height: 4px;
+                width: 100%;
+                max-width: 64px;
+
+                background-color: $primary-fg-color;
+            }
+        }
+    }
+}