Adds 50 pixels to the Shuttle Manipulator width (#5186)

# About the pull request
As title says, currently the shuttle manipulator opens up slightly too
narrow to entirely fit the buttons on one line and this can make it hard
to interpret what shuttle is being disabled. This makes the default
width a bit bigger.
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# Explain why it's good for the game
# Testing Photographs and Procedure
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<summary>Screenshots & Videos</summary>

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# Changelog
:cl:
ui: Shuttle manipulator UI is now slightly wider on initial startup.
/:cl:

code/controllers/subsystem/shuttles.dm

@@ -504,7 +504,7 @@ SUBSYSTEM_DEF(shuttle)
 /datum/controller/subsystem/shuttle/tgui_interact(mob/user, datum/tgui/ui)
 	ui = SStgui.try_update_ui(user, src, ui)
 	if(!ui)
-		ui = new(user, src, "ShuttleManipulator", name, 800, 600)
+		ui = new(user, src, "ShuttleManipulator", name, 850, 600)
 		ui.open()