[Patch] Allow deletion of multiple keys

[DwiSecundus]

If a node/way has many keys and one wants to delete them all, each one has to be left-clicked and can then be deleted. It would be useful if all or some of them could be selected with Shift/Ctrl+LeftMouse, so that a click on "Delete" deletes the selected ones.

[xeen]

Also, it would be nice if upon deletion it would focus the next tag instead of nothing.

[xeen]

The attached patch doesn't fix the original request. I'm not too fond of adding multiple selection to the tag editor when the only thing you can do with it is delete tags. Also, it would be the only (sidebar) dialog that allows multiple selection (only places I know are mappaint and customize toolbar in the options dialog). I'd like to hear other opinions before I continue.

The patch does the following:

• trim keys/values on add/edit
• on edit re-select the edited key
• on delete, select the next key (this makes deleting all keys much easier than it is now)
• (By the way: Is the indentation default now two or four spaces?)

[xeen]

This is probably the nicer version

[anonymous]

Applied in r1268.

[joshdoe]

There is now a patch for this in #6883.