Merge remote-tracking branch 'upstream/master'
Implement display blurring for overzoomed charts on OpenGL
Add missing file to .po scanner list.
Improve international font specification loading/scrubing from config file.
Clear and re-write font descriptor list in config file on exit.
Correct invalid LUP fault on some PlugIn ENC chart rendering.
Correct occasional fault adding last point on Track::Stop()
Remove repeated log messages on COMM port failure.
Correct course up/north up toggle by compass/GPS status icon click.
Improve Menubar ItemStateSelect logic
Merge pull request #202 from CaesarSchinas/colours

Fix dialog colours on OS X (and minor fixes other platforms)
Improve overzoom emphasis method for vector charts.
Improve Responsive mode font selection logic
Avoid null dereference on invalid image data.
Update name-cached AIS target rendering colour.
Add FullScreen toggle to chart context menu in Touch mode.
Correct overzoom fog/blur for graphics cards not supporting glGenerateMipmap()
Partially revert previous commit, use fog blurring if glGenerateMipmap is unavailable.
Implement demangling of the type names and exact comparison
Merge pull request #203 from CaesarSchinas/options

Options