we don't support the simple backgriund anymore

Change-Id: I4a0238f5a2729f8b7ace3988c3fe890fba2a4341
no need for that include

Change-Id: Ifd3438224a824c190b87ea011e6c02668ad0a3e2
move to OpenGLWindow step one

Change-Id: I9f019a397f8b0daf27f0969b1f23539438eb6422
don't add the changes toolbar to the forms window, fdo#76752

Change-Id: I1a5d62b0995343a73fd8d6941f0fa380bb19e783
remove the framebuffer rendering

Change-Id: I2510a00b24a6a3c045a6ee2ccb21c022d3404000