 [table] recalculate the row and column count when a child is removed
 [table] recalculate the row and column count when a child is removed

When a child is removed, the internal count of rows and columns needs to
be updated.

Fixes http://bugzilla.moblin.org/show_bug.cgi?id=7224

pwithnall/mx,pwithnall/mx,clutter-project/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx,pwithnall/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,clutter-project/mx,jonnylamb/mx