Strip obsolete dependencies (#8)

mdpopups vendors all libraries it needs, so all others can be removed.

Merge pull request #1232 from equinusocio/develop

Merge pull request #1224 from equinusocio/develop

Merge develop

Merge pull request #1218 from equinusocio/develop

Merge branch 'develop'

release: 4.1.2

chore: Restore themes

Merge branch 'develop'