Work around OpenGL mipmap base level error in Mac platform drivers.
Bound underzoom of charts on piano selection with "Preserve Scale.." option set.
Correct PlugIn OpenGL overlay logic for API v1.12.
Merge pull request #170 from Ptizef/master

Apply general User Font setting for grib_pi dialogs
Bound CPU duty-cycle of GRIB Particle display rendering to 50%.
Update translations
Suppress chart outline and piano bar rendering for PlugIn charts when PlugIn is disabled.
Improve options->Charts progress dialog responsiveness.
Correct Route->Addpoint length calculation after undo (FS#1540)
Remove unnecessary wxWidgets version dependency
3.3.2222
Correct compiler warning
Reduce maximum GRIB particle rendering duty cycle to 33 %