Fix possible crashes in form undo/redo, make it properly work with alignment properties of widgets
Summary:
Undo/redo alignment fixes
+ limit image set of available alignments in widgets depending on widget class (image box is special)
BUG:380175
BUG:342371
BUG:348976
FIXED-IN:3.0.2
Test Plan: See https://bugs.kde.org/show_bug.cgi?id=380175#c0
Reviewers: piggz
Reviewed By: piggz
Tags: KEXI
Differential Revision: https://phabricator.kde.org/D5969