WDF/BA Updates:

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- EmailSender: catch 'recipients failed' error.
- Improved CSS backgrounds for toggles.
- Due to not-wanted clicks, stopPropagation() was added to auto-complete input fields.
- Introduced customer based tmp-directory. This avoids duplicate WDF/BA file names overwriting each other.
- New function: mv_array_rdiff which does a recursive diff.
- mv_textarea now replaces tabs with 3 spaces.
- GP000 can now show the difference between data before and after it was updated.
- Various under the hood code improvements.