proper fix for https://github.com/vector-im/vector-web/issues/917 and resolve https://github.com/vector-im/vector-web/issues/928

src/skins/vector/css/matrix-react-sdk/views/rooms/MemberList.css

@@ -51,14 +51,14 @@ limitations under the License.
 }
 
 .mx_MemberList .mx_SearchableEntityList_expanded {
-    flex: 1 1 100%;
-    -webkit-flex: 1 1 100%;
+    flex: 1 0 0;
+    -webkit-flex: 1 0 0;
 }
 
 .mx_MemberList_joined {
     order: 2;
-    flex: 1 1 100%;
-    -webkit-flex: 1 1 100%;
+    flex: 1 0 0;
+    -webkit-flex: 1 0 0;
 
     overflow-y: auto;
 }

src/skins/vector/css/vector-web/structures/RightPanel.css

@@ -17,8 +17,6 @@ limitations under the License.
 .mx_RightPanel {
     position: relative;
 
-    height: 100%; /* needed for memberlist flexbox to work in chrome 48+ */
-
     display: -webkit-box;
     display: -moz-box;
     display: -ms-flexbox;