Updated language files

Completed in less than a week - I have the best translators on the
planet!  (Also, the Language Editor seemed to expedite things, hopefully
making it well worth the effort...)
Add GioRock link to About dialog
Increase vertical height of Plugin Manager to better accommodate translations
Slightly modify text size calculation to improve output

Word-wrapped text continues to confound DrawText.  VB must use a
different internal wordwrap mechanism than DrawText does - however, this
seems to fix the problem for Italian help text on the batch process
form...
Further modifications to text size calculation

Batch Process now triggers correctly - perhaps a -1 to .width was all
that we needed...?
Fix missing translation code for various common dialogs

Titles and file filters on obscure common dialogs were not being
translated - thanks to GioRock (PD's Italian translator) for reporting
this.