Configure.ac: fix check for 32 bit luac on some platforms
macosx: removed 6 strings
macosx: remove open BDMV folder button

Two different buttons signify to the user that there is an
actual difference in using either of these. But in fact,
both call the same code and if the folder is misnamed, even
the BDMV button would classify the folder as a DVD type.

stringcount--
macosx: increase size of dvd menu button for l10n
macosx: cleanup blocked shortcuts