Explore typing notifications inspired by web

- Update for dark mode

Riot/Modules/Room/Views/BubbleCells/RoomTypingBubbleCell.xib

@@ -4,7 +4,6 @@
     <dependencies>
         <deployment identifier="iOS"/>
         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17703"/>
-        <capability name="System colors in document resources" minToolsVersion="11.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
@@ -25,7 +24,7 @@
                     </label>
                     <view contentMode="scaleToFill" ambiguous="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Bn5-WN-DQs" customClass="DotsView" customModule="Riot" customModuleProvider="target">
                         <rect key="frame" x="38" y="13" width="91" height="18"/>
-                        <color key="backgroundColor" systemColor="systemBackgroundColor"/>
+                        <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                     </view>
                 </subviews>
                 <constraints>
@@ -46,9 +45,4 @@
             <point key="canvasLocation" x="166.66666666666669" y="20.758928571428569"/>
         </tableViewCell>
     </objects>
-    <resources>
-        <systemColor name="systemBackgroundColor">
-            <color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
-        </systemColor>
-    </resources>
 </document>