Add --fit OSD option and use it for system shutdown/reboot/logout

test/shell.d/osd-test.sh

@@ -9,6 +9,7 @@ const osd = requireFromRoot('shell/plugins/osd/OsdModel.js')
 
 assertEqual(osd.iconFor('', 0), osd.iconFor('muted', 50), 'osd falls back to muted icon at zero percent')
 assertEqual(osd.iconFor('volume-high', 1), osd.iconFor('', 100), 'osd maps high volume aliases')
+assertEqual(osd.iconFor('logout', 50), '󰍃', 'osd maps logout icon')
 assertEqual(osd.iconFor('custom-symbol', 50), 'custom-symbol', 'osd preserves unknown explicit icons')
 
 assertDeepEqual(
@@ -20,7 +21,8 @@ assertDeepEqual(
     value: 75,
     message: '75%',
     icon: osd.iconFor('volume', 75),
-    duration: 800
+    duration: 800,
+    fit: false
   },
   'osd builds progress state'
 )
@@ -34,8 +36,24 @@ assertDeepEqual(
     value: 0,
     message: 'Paused',
     icon: osd.iconFor('media-pause', -1),
-    duration: 1200
+    duration: 1200,
+    fit: false
   },
   'osd builds message state'
 )
+
+assertDeepEqual(
+  osd.stateForShow('shutdown', 'Shutting down…', '', '100', '', '5000', '1'),
+  {
+    iconKey: 'shutdown',
+    maxValue: 100,
+    hasProgress: false,
+    value: 0,
+    message: 'Shutting down…',
+    icon: osd.iconFor('shutdown', -1),
+    duration: 5000,
+    fit: true
+  },
+  'osd parses fit flag'
+)
 JS