Update Color Management menu related options and actions

Some soft-proofing options were moved from Preferences to the Image menu.

Link between Color Management in Preferences, Color Management under the View menu, and Color Management under the Image menu from each place.

Removed two outdated and unhelpful screenshots of a single menu which add no additional value to readers and only create more work for translators.

Correct some names of menu items.

Note: The menu items moved from Preferences to the Image menu were added to src/menus/image/color-management.xml as plain text and no subpages were created yet. The text is a 1:1 copy from the previous Preferences page not to create work for translators for now.

See #400