Info view mode in the Color Maps Browser

Description

Info view mode in the Color Maps Browser that shows detailed information about the used colors in the color map and that also allows to copy those values.

Additionally to the two already available views (icon and list), a new view is added where the detailed information for the used colors is shown in a table:

Conformity

• Changelog entry
• Unit tests
• Update INSTALL
• Downport
• Fixes: