Some assert( layerStack->GetCurrent()!=NULL ) have been replace because
GetCurrent() of a layerStack can be null if no image is open.

And those functions can be called with keyboard shortcuts.

This projection bar widget is used to edit the selected
projection zoom level.

The zoom/scale is not updated if the text line is not modified.
But if return is pressed, then the scale is forced to be updated.

Correct initialization of comboBox Items and remove code redundancy.

This reverts commit 2c534ee8.

Revert "Revert "ENH: Mantis-1355 : Apply patch to set OTB_APPLICATION_PATH environment..."" this fix was fine

This reverts commit 562ddd8d.

The fix consists of:
- Quicklook and Histogram widgets:
    * More flexible min/max sizes
- Color Setup Widget
    * Remove uninformative label to save vertical space
    * Change size policy to Minimum
    * Add 9px margin for look and feel

Revert "ENH: Mantis-1355 : Apply patch to set OTB_APPLICATION_PATH environment variable in monteverdi desktop file"

This reverts commit cb38ea6f.

ENH: Mantis-1355 : Apply patch to set OTB_APPLICATION_PATH environment variable in monteverdi desktop file

Swap delete and delete all buttons order
Change delete icon to be visually more different than delete all

Add ITK_OVERRIDE msotly in Monteverdi

save override in OTB (need to manually fix this after tidy)
  cd src/Modules ; grep -nR "override" * > ~/temporary/override_otb.txt
  cd ~/software
  python run-clang-tidy.py -checks=-*,modernize-use-override -header-filter=/home/grizonnetm/projets/otb/src/OTB/Modules/.*/.*/include/.* -j8 -fix -p ~/projets/otb/bin/release/OTB-clang3.8/ ~/projets/otb/src/OTB/Modules/*/*/src/*.cxx ~/projets/otb/src/OTB/Examples/*/*.cxx ~/projets/otb/src/OTB/Modules/*/*/test/*.cxx > ~/temporary/run-clang-tidy-log.txt
  #rename override with ITK macro ITK_OVERRIDE
  cd src/Modules
  find . -path ./ThirdParty -prune -o -type f -print -name "*.h" -o -name "*.txx" | xargs perl -pi -e 's/\ override/\ ITK_OVERRIDE/g'