fix: GTK maximize button + polkit agent in KDE VNC bootstrap

Expand KDE VNC keyboard layout selector from 4 to 24 layouts covering
all major EU countries (bg, hr, cz, dk, nl, gb, us, ee, fi, fr, de, gr,
hu, it, lv, lt, no, pl, pt, ro, sk, si, es, se). Layout labels are not
translated — keyboard layout names are internationally understood proper
nouns.

Also remove maxWidth constraint on the FormSelect so the full dropdown
element (including the chevron arrow) is clickable.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Johan

src/CreateMachineDialog.jsx

@@ -160,6 +160,36 @@ const DESKTOP_CONFIG = {
     },
 };
 
+// XKB keyboard layouts offered in the KDE VNC bootstrap dialog.
+// Labels are intentionally not translated — keyboard layout names are
+// internationally understood proper nouns (Swedish, German, French, …).
+const KEYBOARD_LAYOUTS = [
+    { value: 'bg', label: 'Bulgarian (bg)' },
+    { value: 'hr', label: 'Croatian (hr)' },
+    { value: 'cz', label: 'Czech (cz)' },
+    { value: 'dk', label: 'Danish (dk)' },
+    { value: 'nl', label: 'Dutch (nl)' },
+    { value: 'gb', label: 'English / UK (gb)' },
+    { value: 'us', label: 'English / US (us)' },
+    { value: 'ee', label: 'Estonian (ee)' },
+    { value: 'fi', label: 'Finnish (fi)' },
+    { value: 'fr', label: 'French (fr)' },
+    { value: 'de', label: 'German (de)' },
+    { value: 'gr', label: 'Greek (gr)' },
+    { value: 'hu', label: 'Hungarian (hu)' },
+    { value: 'it', label: 'Italian (it)' },
+    { value: 'lv', label: 'Latvian (lv)' },
+    { value: 'lt', label: 'Lithuanian (lt)' },
+    { value: 'no', label: 'Norwegian (no)' },
+    { value: 'pl', label: 'Polish (pl)' },
+    { value: 'pt', label: 'Portuguese (pt)' },
+    { value: 'ro', label: 'Romanian (ro)' },
+    { value: 'sk', label: 'Slovak (sk)' },
+    { value: 'si', label: 'Slovenian (si)' },
+    { value: 'es', label: 'Spanish (es)' },
+    { value: 'se', label: 'Swedish (se)' },
+];
+
 function detectFormat(url) {
     const u = url.toLowerCase();
     if (u.match(/\.(raw|img)(\.gz|\.xz|\.bz2)?(\?.*)?$/)) return 'raw';
@@ -1162,12 +1192,10 @@ export function CreateMachineDialog({ images, onClose, onRefresh, onAddNotificat
                                         value={kbdLayout}
                                         onChange={(_e, v) => setKbdLayout(v)}
                                         isDisabled={running}
-                                        style={{ maxWidth: '220px' }}
                                     >
-                                        <FormSelectOption value="se" label={_("Swedish (se)")} />
-                                        <FormSelectOption value="us" label={_("English / US (us)")} />
-                                        <FormSelectOption value="es" label={_("Spanish (es)")} />
-                                        <FormSelectOption value="de" label={_("German (de)")} />
+                                        {KEYBOARD_LAYOUTS.map(({ value, label }) => (
+                                            <FormSelectOption key={value} value={value} label={label} />
+                                        ))}
                                     </FormSelect>
                                 </FormGroup>
                             )}