Improvment frame Handling: In previous version, especially during fast menu operations, from time to time a flicker (in case of cyclic updated views) or corrupted menus appeared. Possible root cause is a interferance in the chain: refresh display (~100ms) => release frame (in parallel to) provide frame (~45ms) => clear frame (~45ms). to improve the behaviour the clear frame loop is not iterated until all bufferes are cleared (before one buffer every~45ms). getFrame() does now iterate through all frame buffers instead reusing the first possible (to avoid ghoust views and to provide more time to housekeeping function for cleanup)

1b9be6040d8279117c7fc99d528790611638f10b V1.4.7 release
ba9d99a2e310da601a948ff11ad665260c600e18 v1.4.8 release
143fe85f82a2e2aca50eb0c29bc55066cb4fe497 v1.5.0 release
afa55a50cc724b11b959fa81567d59ede251ef22 v1.5.1 release
54a480c43e977db8fc6969551ad6148f2ad46e15 v1.5.2.beta release
5b4c78c36b0456ff65d1a0870d07d4072045480d v1.5.3 release
e9ca66ce36e5c7b023e2b75168c3c8246c6519f2 v1.5.4 release
02e7e11fdbe8c12fdd250074b97db921ef9f1164 1.5.5 release
06ec1da5e1055b39b71bb7e0114ecfdd4f958959 v1.5.6 release