Inconsistent MapMode focus behaviour

[Zverikk]

Some actions (select, draw, delete) call Main.map.mapView.requestFocus() when a mouse button is pressed inside a map window, but most of them don't. As a result, if a focusable component (e.g. relation search field in relations panel) is focused and you want to change MapMode from "extrude" to "select", you cannot click on the background and press "s": you have to press a MapMode button. And experienced mappers like me often hide it from the toolbar.

So there's a problem: when a JosmTextField is focused, the current action does not call requestFocus and most-used mapmode buttons are hidden, it's not easy to change the mapmode. The requestFocus should be made mandatory for all mapmodes, even in plugins.

[Don-vip]

In 5960/josm:

see #8710 - Inconsistent MapMode focus behaviour: fix core mapmodes

[Don-vip]

In 5962/josm:

see #8710 - Inconsistent MapMode focus behaviour: forgot one mapmode

[Don-vip]

Plugins: fixed in [o29595].