fix: reset capture viewport after keyboard navigation

tests/test_create_issue_modal.py

@@ -30,9 +30,11 @@ function element(id) {{
 const launcher = element('mobile-new');
 const cancel = element('cancel-new-issue');
 const title = element('create-issue-title');
+const panel = {{...element('create-issue-panel'), scrollTop:420}};
 const background = [element('header'), element('main'), element('mobile-task-dock')];
 const root = {{
-  querySelector: selector => selector === '#cancel-new-issue' ? cancel : null,
+  querySelector: selector => selector === '#cancel-new-issue' ? cancel :
+    (selector === '.create-issue-panel' ? panel : null),
   querySelectorAll: () => [cancel, title],
   addEventListener() {{}}, removeEventListener() {{}},
 }};
@@ -44,14 +46,14 @@ lifecycle.open(launcher);
 const opened = {{active:document.activeElement.id, inert:background.map(item => item.inert)}};
 lifecycle.close();
 process.stdout.write(JSON.stringify({{
-  opened, closed:{{active:document.activeElement.id, inert:background.map(item => item.inert)}}
+  opened, closed:{{active:document.activeElement.id, inert:background.map(item => item.inert), scrollTop:panel.scrollTop}}
 }}));
 """
     )
 
     assert result == {
         "opened": {"active": "cancel-new-issue", "inert": [True, True, True]},
-        "closed": {"active": "mobile-new", "inert": [False, False, False]},
+        "closed": {"active": "mobile-new", "inert": [False, False, False], "scrollTop": 0},
     }