changes needed for wx-3.0, also tested with wx-2.8
Merge branch 'master' of https://github.com/OpenCPN/OpenCPN into wx-3.0
Apply global colours scheme on dialogs and overlays #FS232
Correct numbers rendering (night mode)
Correct Isoline rendering for no rectangular zone ( Norway forecast for example )
Correct request dialog behavior : geopotential altitude data
only enabled for GFS modele
Correct Grib Overlay orientation
Merge pull request #106 from seandepagnier/wx-3.0

changes needed for wx-3.0, also tested with wx-2.8
Merge pull request #108 from Ptizef/master

Apply global colours scheme on dialogs and overlays  #FS232
Correct to avoid potential deref(0) crashes.
Add missing forward declaration.
Improve/update PlugIn blacklist contents and runtime reporting.
Update wxWidgets library dlls to enable PDB debugging.
Correct for duplicate shared waypoints on route import.
Correct behaviour of ">" symbol in Route Properties dialog (FS#1262)
Implement layer delete confirmation dialog (FS#1357)
Improve TCP server datastream loss-of-client responsiveness.