Add composer controls wrapper to set correct width on the composer controls wrapper div

config.json

@@ -1,4 +1,4 @@
 {
-    "default_hs_url": "https://matrix.org",
-    "default_is_url": "https://vector.im"
+    "default_hs_url": "http://localhost:8008",
+    "default_is_url": "http://localhost:8090"
 }

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

@@ -37,6 +37,10 @@ limitations under the License.
     display: block;
 }
 
+.mx_MessageComposer_composecontrols {
+    width: 100%;
+}
+
 .mx_MessageComposer_noperm_error {
     display: table-cell;
     width: 100%;