Workspace: Only show hotseat outlines if hovering over

Change-Id: Ib5b3373cec6d54f6136fca6a1a6663c1fe93ef9b
Fix moving icons from workspace to vertical hotseat

Still need to fix moving from app drawer to vertical hotseat

Change-Id: Id1561ebca07d88db486a4ceb23e6aac34068f361