Fixing check for when to hide the plugin's button, although I'm doubtful that display:none on the button for a plugin that won't work is the right approach; for example it might mess up keyboard support in Toolbar.   Fixes #7828 !strict.
Fixing check for when to hide the plugin's button, although I'm doubtful that display:none on the button for a plugin that won't work is the right approach; for example it might mess up keyboard support in Toolbar.   Fixes #7828 !strict.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@21691 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful