#46 SideKick: Share parser mode option panes with plugin options

Sidekick provides a mode options dialog to which parsers can contribute option panes for mode-specific options.
It would be nice if the same option panes could be used by the Plugin Options dialog as well as the SideKick dialog. The sidekick parsers should have a single implementation of these mode option panes that would automatically fit both the sidekick dialog and the plugin options dialog.