Uniquely identify nav thumbnail containers if there are more than one slider...

Added the option to use Slider navigation with thumbnails. It can be configured in the display mode settings.

Closes #3353779

assigned to @ipwa

changed target branch from 1.0.x to 1.1.x

added 2 commits

• 5f76ebfa - 1 commit from branch 1.1.x
• c009d469 - Merge remote-tracking branch 'origin/1.1.x' into 3353779--navigation-thumbnails

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approved this merge request

merged