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.

Revert "BUG: prevent tinyxml header to define DEBUG on windows, conflict with itk::LoggerBase::DEBUG"

This reverts commit 507c6dc2.

This reverts commit f618e6c6.

(does not actually fix the issue.)

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

Put DEM clear and loading in DoUpdate().
This change correct a side effect that was present in DoExecute() function.

Update color of the badge to match that of the delete icon.

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

BUG : Mantis-1335 : Increase monteverdi stack size and correct Segfault when rsr parameter is not provided.

Monteverdi stack size is increase in order to use 6s code.
WavelengthSpectralBandVectorType wasn't initialized and result wasn't used.