[DF-2311] - fixed changing properties for Platform/Screen/Aggregator nodes.
[DF-2316] - crash while editing UITextField Font properties is fixed.
[DF-1823] - UIControl::IsVisibleForUIEditor() is now recursive.
[DF-2330] - disabling VisibleForUIEditor() flag also removes this control from selection.
[DF-2310] - additional check for # of selected controls for Align/Distribute logic.
[DF-2344] Fixed memory leaks
[DF-2319] - mouse wheel filtering added for Text Field and Flags widgets.
[DF-1994] - horisontal alignment for UITextField is fixed.
Merge remote-tracking branch 'origin/to_master' into to_master_wotg