Adapt the speed dial's ActionRegistry to the collapsed
get_plugin_capability(PluginCapabilityId) overload, and restore the
script success/skipped status message the dialog lost when its
PluginScriptRunner refactor was superseded by ActionRegistry.
* fix: impl refactor
* fix: unload/load python module, race conditions, freezes
* remove dead code
* remove extra hook
* remove more dead code
* fix gil run script
Replace the toolbar sort dropdown with sortable Name/Source/Status column
headers that cycle ascending, descending, then clear. Add a Source column
and a PluginSortKey::None baseline for the cleared state. The whole header
cell is the click target and the sort triangle snaps in without a fade.
