Improve PlugIn tool icon management to avoid occasional crash.
Initialize szchar arrays before use.
Merge branch 'master' of https://github.com/OpenCPN/OpenCPN
Improve Compass window butmap caching logic.
Improve quilt performance by deferring all region calculations until just-in-time.
Improve OpenGL performance by avoiding GL attribute push/pop where possible.
Correct build error on previous but 1 commit.
Improve math (int)round() function performance in S57 module.
Merge branch 'master' of https://github.com/OpenCPN/OpenCPN
Correct crash on Track Properties List, Right Click.
Correct crash on tide harmonic index file extension specified as lower case "idx".
Disable OnPaint() precessing while populating Quilt to improve performance.
Improve processing of National Texts in S57 ENCs
Improve performance of Layer Delete function.
3.3.910
Merge branch 'master' of https://github.com/OpenCPN/OpenCPN