Float panel doesn't hide

[Garry Yao]

Reproducing Procedures

1. Open the replace by class example page within the KAMA branch.
2. Click on 'Styles' combo to open dropdown float panel;
3. Click any positon inside document;
   • Expected Result : Float panel will auto hide.
4. Right click to open context menu;
   • Expected Result : Float panel will auto hide.
5. Click any positon inside document;
   • Expected Result : Float panel will auto hide.

[Garry Yao]

Related to #3068.

[Artur Formella]

Blur is disabled in floatpanel. Probably for debugging. When you finish please set Review+