Added: optionally include descendants in non-wildcard filters
Changed: filter checkboxes now work in reverse; checking them shows that particular group, unchecking hides it (makes more sense)
Added: Read-Only toggle (applies to all related files; .pas, .dfm, .ddp)
Added: Read-Only overlay indicator
Fixed: right-click in the list now selects the item under the cursor (preserving a multi-select when right-clicking an already selected item)
Fixed: Ctrl-Up/Down (for the MRU list) did not filter the list immediately
Fixed: Issue #174
Fixed: Issue #178