Fix some issues with disabled edit fields.

tests/browser-disabled-fields.html

@@ -0,0 +1,14 @@
+<!doctype html><title>Cthulhu Browser Probe</title>
+<p>Before fields</p>
+<div tabindex="0" aria-label="Completed row" onclick="">
+<div><input autofocus id="answer" aria-label="Answer" value="Solved"></div>
+<div><input id="readonly" aria-label="Read only answer" value="Confirmed" readonly></div>
+</div>
+<input type="password" aria-label="Secret" value="Private fixture">
+<p>After fields</p>
+<script>document.addEventListener('keydown', e => {
+if (e.key === 'F9') {
+  document.getElementById('answer').disabled = true;
+  document.getElementById('readonly').disabled = true;
+}
+});</script>

tests/native_browser.py

@@ -12,6 +12,7 @@ from native_test_session import run_private_session
 
 
 BROWSER_PROOFS = {
+    "disabled-fields": ("./internal/app", "^TestNativeBrowserDisabledFieldsRemainReadable$", 40, 70, "browser-disabled-fields.html"),
     "live-atomic": ("./internal/atspi", "^TestNativeBrowserAtomicLiveRegion$", 30, 35, "browser-live.html"),
     "replaced-feed": ("./internal/atspi", "^TestNativeBrowserMissingFeedRefreshesWholeBranch$", 30, 35, "browser-replaced-feed.html"),
     "nested-document": ("./internal/app", "^TestNativeBrowserNestedDocumentHeadings$", 40, 45),