refactor(mod-tools): drop the launcher Context strip

The Context strip at the top of the launcher showed which room the
mod is currently observing — green pill + door icon when in a room,
zinc strip when not. In practice it's noise: the Room Tool / Chatlog
Tool buttons right under it already gate on the same in-room state
(disabled when not in a room) and carry their own tooltip explaining
that. The strip duplicated the signal without adding actionable info.

Remove the section, the now-unused FaDoorOpen / FaDoorClosed imports,
and the matching `modtools.window.section.context` /
`modtools.window.context.room` locale keys (from both the runtime
UITexts.json and the versioned UITexts.example template).

public/configuration/UITexts.example

@@ -124,11 +124,9 @@
     "modtools.window.user.clear":  "Clear selection",
     "modtools.window.tickets.open":  "%count% open ticket",
     "modtools.window.tickets.open.many":  "%count% open tickets",
-    "modtools.window.section.context":  "Context",
     "modtools.window.section.room":  "Room",
     "modtools.window.section.user":  "User",
     "modtools.window.section.reports":  "Reports",
-    "modtools.window.context.room":  "Room #%roomId%",
     "modtools.window.user.open_info":  "Open Info",
     "modtools.userinfo.refresh":  "Refresh user info",
     "modtools.userinfo.presence.in_room":  "In room",