Bug 443555/Bug 441045: SWT: Smartfield does not work in Linux and Mac OS
X
https://bugs.eclipse.org/bugs/show_bug.cgi?id=443555
https://bugs.eclipse.org/bugs/show_bug.cgi?id=441045

Fixed the various problems when requesting the proposal popup and
accepting proposals in form-fields as well as in cell-editors. The main
issue was that the popup dialog became the active shell and focus owner
which triggered to many verify events. Furthermore, the focus handling
of the multiline text cell-editor was facilitated and improved to have
the same behavior as in the smartfield's cell editor.