Merge pull request #896 from mpoimer/bugfix/mute-on-desktop

Fixed allowMute being ignored on Desktop

Author: diegotori

lib/src/material/material_desktop_controls.dart

@@ -291,7 +291,8 @@ class _MaterialDesktopControlsState extends State<MaterialDesktopControls>
                 child: Row(
                   children: <Widget>[
                     _buildPlayPause(controller),
-                    _buildMuteButton(controller),
+                    if (chewieController.allowMuting)
+                      _buildMuteButton(controller),
                     if (chewieController.isLive)
                       const Expanded(child: Text('LIVE'))
                     else