re-apply new scalar CSS

src/skins/vector/css/matrix-react-sdk/views/settings/IntegrationsManager.css

@@ -14,20 +14,18 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-.mx_IntegrationsManager {
-    display: -webkit-flex;
-    display: flex;
-    width: 100%;
-    height: 100%;
-    -webkit-align-items: center;
-    align-items: center;
-    justify-content: center;
-    -webkit-justify-content: center;
+.mx_IntegrationsManager .mx_Dialog {
+    width: 60%;
+    height: 70%;
+    overflow: hidden;
+    padding: 0px;
+    max-width: initial;
+    max-height: initial;
 }
 
 .mx_IntegrationsManager iframe {
     background-color: #fff;
     border: 0px;
-    width: 720px;
-    height: 512px;
+    width: 100%;
+    height: 100%;
 }