ModStage 0.0.15

Fixed

• ModStage hid every other mod's band above the prompt. Its band never asked the mods beneath it for theirs, so while ModStage was installed, context-bar, token-weather, cache-tax's keep-warm row and any other mod that draws above the prompt showed nothing. ModStage is an add-on and must not replace what a person already runs: its band now takes the shared place above the prompt (a Box keyed band:modstage, in the bands column the community band mods already use), below the bands the other mods draw, and a failing mod beneath it cannot take it down. A survey still hides ModStage's band, and only that. Regression tests mount a second mod's band under ModStage on desktop and terminal and fail on 0.0.14. Reported by a user running context-bar and token-weather beside ModStage.