Shell: tooltips at once, one or two words; text-size buttons are drawn − and +

Every header and top-bar button's title becomes a tip the shell shows the
moment the pointer arrives (the browser's own waits a second and looks
different everywhere); it moves from `title` to data-tip so the native one
never appears, and a module that sets `title` again is picked up on the
next hover. The shell's own labels are "Settings" and "Remove"; the top
bar's are "Fullscreen", "Add tile", "Layouts", "Admin"; Slack, PCO Plan,
ProdCom and Timers shorten theirs to match. A− / A+ are a drawn − and +
in Slack, PCO Plan and ProdCom, sized like every other header icon.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

modules/propresenter-timers/client.js

@@ -283,7 +283,7 @@ export default function create({ root, moduleApi }) {
   let menuEl = null; // the open menu's element (filled on each open)
   const itemsMenu = solo ? null : moduleApi.header.addMenu({
     label: 'Timers ▾',
-    title: 'Choose which timers this tile shows',
+    title: 'Choose timers',
     build(menu) {
       // the shell hands over an emptied element on every open
       menu.classList.add('tm-menu');