Merge master into next

* commit 'aa525d5d662ea6c7036e47a07e4c8a146a773e5f':

Change-Id: Ibf1ae67b96ac78f60900aae4be52c511b12e522f
Merge branch 'master' into 13876_log_scaled_axes

* master:
  Avoid using vtkExtentTranslator from the pipeline.
  Fix test playback missing pqLineEdit changes.
  Fix build issues
  Fix warnings
  BUG #13965. Fixes plethora of panel usability issues.
  BUG #13964: Validate values for double/int properties.
  Make the Apply button green even when inactive.
  BUG #13889. Fixed arbitrary spacing on the top of properties panel.
  Adding ability to specify stereo-type in pvx.
  Fix build issues with older gcc versions.
  Fix build issues with GCC 4.1.
  Bring in VTK fixes for OpenGL includes.

Conflicts:
	VTK

Change-Id: Ib37f07371d95867a1c445389d44838cfc7ba439f
Merge topic '13876_log_scaled_axes' into next

278407d Merge branch 'master' into 13876_log_scaled_axes
807ee52 Bump VTK to catch vtkAxis fixes.
749f88c Fix bugs 13876, 13877, 13899 (log-scaling).