Set previous focus target to editor that opens drawer

[tomasMizera]

Qt's Popup (and its subclasses Drawer, Dialog) saves Window.activeFocusItem when open() is called and restores it when the popup closes. In forms with a text editor above a dropdown or date field, the editor often held active focus at the moment the drawer opened - so on close, focus was returned to it, raising the on-screen keyboard and pushing content out of view.

Fix: call forceActiveFocus() on the editor component immediately before activating the Loader. This moves active focus to the component that logically "owns" the interaction, so the Popup saves it as the restore target. On close, focus returns to that component - not to a text editor further up the form.

Applied to:

• Form editors: dropdowns, calendar, relation, relation reference, scanner, photo viewer
• Filter inputs: dropdowns, calendar

Fixes #4522

[github-actions]

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Relevant Lines:	15636
Covered Lines:	9231
Line Coverage:	59.04%
Coverage Strength:	97.54 hits per line

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