GLJPanel Cleanup: Remove initial FBO reshape; Propagate reshape only if differs from panel-size; Use pre-fetched panel-size.
FBObject.reset(..): Return true if modified, otherwise false
GLFBODrawableImpl: Utilize common self-contained setupFBO(..) method for FBO creation incl. Bug 1020 glClear(..) ; Fixes missing fbo.unbind(gl)

Utilize common self-contained setupFBO(..) method for FBO creation incl. Bug 1020 glClear(..)
  initialize(..) and reset(..)'s fallback code
  contained duplicated FBO setup/creation code.

  The former was updated to suite the new FBO mode bits,
  where the latter left untouched, hence was buggy.

  Now setup and creation of a single FBO has been merged into setupFBO(..).

Fixes missing fbo.unbind(gl):
  We did no issue unbind() on each fbo instance
  while adding the workaround for Bug 1020.

  Adding fbo.markUnbound() call to all fbos but the last.

  Note: This might not cause any issues, since fbo.bind(gl) tests the currently bound fbo.
doc/TODO.txt: Remove resolved tasks