v1.0.3

• fix: crash on File > New Show with unsaved changes
• fix: import .tmix channel names as actor names
• fix: live-update DCA mapping panel on cue edits
• feat: show per-cue DCA names in mapping-page dropdowns
• feat: add Import Show button to the welcome dialog
• fix: stop MIDI dialog buttons floating below empty tables
• feat: per-actor choice of role name as the channel label
• refactor: de-duplicate names across the DCA mapping page
• fix: fit inline item-view editors app-wide via stylesheet
• feat: Add Actors / Add Roles buttons and multi-select delete