[widgets][databaseeditor] Allow content of the DB viewer to be selected

This will enable users to copy elements of the v1 implementation.
2 jobs for 183_database_editor in 14 minutes and 55 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build
passed #163937
docker-build
build_linux_36

00:06:57

passed #163938
macosx
build_macosx_36

00:07:58