fix: capability to dismiss the keyboard on drag for iOS on RoomsListView (#5094)

* fix: add the capability to dismiss the keyboard on drag for iOS

* minor tweak

app/views/RoomsListView/index.tsx

@@ -914,6 +914,7 @@ class RoomsListView extends React.Component<IRoomsListViewProps, IRoomsListViewS
 				windowSize={9}
 				onEndReached={this.onEndReached}
 				onEndReachedThreshold={0.5}
+				keyboardDismissMode={isIOS ? 'on-drag' : 'none'}
 			/>
 		);
 	};