fix: the map's names and routes, and long text in the panels

[vdmkenny]

Flaws of v0.2.0 that real missions showed, found while taking screenshots of mission 6, and a few more found in a review of the code around them:

• Routes faded for no reason. With nothing on the map selected, the inspector falls back to the record under the hidden source's cursor, often a trigger, and every route faded. Routes now fade only when the selection is on one.
• Names under the map's notes. A name could land under the legend, the scale, the axes' note, the player's start note or the selection's place note and brackets. Their places are now taken before the names are placed.
• Table cells ran into the next column. In Threads and Breakpoints, long text such as a thread's line 3159 · offset 3191 overlapped the next column. Cells are now cut with an ellipsis at their column, and a thread's offset shows only where its column has room.
• Long text in other panels. Find cut its lines at 60 bytes, which could split a character, and a long name in Variables ran into its value. Both are now cut at their width with an ellipsis. The empty inspector's, reference's and live scene's messages ran past the panel's edge at the default window size, and now wrap.

The review also shares code: one place for the flight groups' colours, the player's colour and a trigger's on(...) form, a named font size for tags and the map's notes, and named margins and paddings that the map's notes use both to measure and to draw. The ellipsis search halves the length instead of trying each one.

Checked on mission 6 headless, where the map draws the same pixels before and after the review's changes, and with the Threads table linked to OpenReliant, held at a breakpoint.