[BUG] Previous `edit` will draw cursor after switching focus to another `edit` in a different window

[PavelSharp]

As mentioned in comment Nuklear still has a bug when switching focus between two edits(include properties) that belong to different windows. At the moment, the previous edit will continue to draw the caret, but keyboard input is also affected, the edit that receives input depends on which one the mouse cursor is currently hovering over.
Note: This only happens when switching between different windows, not when switching between edits inside the same window.
For more information, see the attached screenshot (tested with SDL2)

[sleeptightAnsiC]

Moving my comment from #852 (comment) (it describes the same issue, nothing really new)

There is also one annoying thing with the edit fields: if the edit is active and you hover over different window, the edit becomes inactive (as expected) but the edit cursor still appears as if it was active (unexpected):

For comparison, this is how terminals deal with this [active on left, inactive on right]:

EDIT: an edit selection is also a problem, but I'm not sure how to deal with something like this:

screenshot (CLICK ME)