[FIX] inline: Return true (synchronously) from enableWysiwygInlineEditing so the icon changes

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@46928 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] inline: Now that inline on/off happens server-side, add feint background and border to plugins so that you can see them while inline editing (hopefully makes it clearer why you can't edit some elements inline yet - plugins not supported)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@46929 b456876b-0849-0410-b77d-98878d47e9d5