Warning on overwriting existing theme

[Meinert Jordan]

Currently OpenLP silently overwrites existing themes with imported themes of the same name.
In some cases it might even overwrite themes with a different name as some characters are striped away from openlp.org 1.x theme names (the theme named "C Note" will overwritten by a theme named "C++ Note").

I'd like to see some [skip] [overwrite] [overwrite all] dialog.

While overwriting a existing theme legacy files from the old one should be removed.

[Phill (phill-ridout)]

How about just happening a number on the end if it already exists?

[Meinert Jordan (m2j)]

I like more to see a warning, as this makes it easier to update the themes. With numbers, you have to remove the theme from all items, delete it, and import a changed one. Adding a number might be a option in the warning dialog.