Menus: make view menu items dynamic

[warpdesign]

Make view menu items dynamic.

• ToggleSplit view, enabled if:

  • no overlay
  • isExplorer

• show/hide hidden files, enabled if:

  • no overlay
  • isExplorer
  • status === 'ok'

• reload active view, enabled if:

  • no overlay
  • isExplorer

• force reload app:

  • always