Ux improvements

[RafaUC]

New Features / Changes:

• Differentiate between explicitly assigned, inherited, partially assigned, and unassigned tags in the tag selector's suggestions.
  • The checkbox indicator follows this rules:
    • Checked: the tag is assigned (explicitly or inherited), and all selected files have the same assignation of that tag.
    • Highlighted: the tag is explicitly assigned in at least one of the selected files.
• Allow to select the file name text in gallery thumbnails.
• Automatically add the merged tag name and aliases to the selected tag when merging tags.
  • Added a checkbox in the merging dialog to toggle this behavior.
• Add context menu options for files to import tags from metadata, export tags to metadata, and clear tags.
• Clearing the search criteria using the clear button no longer triggers a refetch.
• Thumbnail tags overlay now grows only when hovering the tags, not the whole thumbnail.

Optimizations:

• Optimized large selections and tag summaries rendering in thumbnails and the file tags editor using incremental rendering.

Bug fixes:

• Fix bug where the masonry worker did not update correctly after a fetch from an empty view.