Merge branch 'new_release_process_stable' into develop

This reverts PRs on riot-web marked as notready, turning the develop
branch into a more stable version.

src/skins/vector/css/matrix-react-sdk/structures/_RoomView.scss

@@ -172,7 +172,7 @@ hr.mx_RoomView_myReadMarker {
 
     max-height: 0px;
     background-color: $primary-bg-color;
-    z-index: 5;
+    z-index: 1000;
     overflow: hidden;
 
     -webkit-transition: all .2s ease-out;
@@ -260,4 +260,4 @@ hr.mx_RoomView_myReadMarker {
 
 .mx_RoomView_ongoingConfCallNotification a {
     color: $accent-fg-color ! important;
-}
+}