Clear Input Field When Opening Add Team Modal (#9009)

### Steps to test:
- Go to teams page
- Add a team using the modal
- Click "Add Team" again -> field for team name should be empty
- Same if you only enter a team name, then cancel and open the modal
again -> field should be empty

### Issues:
- fixes #8497

------
(Please delete unneeded items, merge only when none are left open)
- [x] Added changelog entry (create a `$PR_NUMBER.md` file in
`unreleased_changes` or use `./tools/create-changelog-entry.py`)
- [ ] Added migration guide entry if applicable (edit the same file as
for the changelog)
- [ ] Updated [documentation](../blob/master/docs) if applicable
- [ ] Adapted [wk-libs python
client](https://github.com/scalableminds/webknossos-libs/tree/master/webknossos/webknossos/client)
if relevant API parts change
- [ ] Removed dev-only changes like prints and application.conf edits
- [x] Considered [common edge
cases](../blob/master/.github/common_edge_cases.md)
- [ ] Needs datastore update after deployment

Author: knollengewaechs

frontend/javascripts/admin/team/create_team_modal_view.tsx

@@ -9,7 +9,7 @@ type Props = {
   isOpen: boolean;
 };
 
-function CreateTeamModalForm({ onOk: onOkCallback, onCancel, isOpen }: Props) {
+function CreateTeamModalForm({ onOk: onOkCallback, onCancel: onCancelCallback, isOpen }: Props) {
   const [form] = Form.useForm();
 
   const onOk = async () => {
@@ -26,10 +26,16 @@ function CreateTeamModalForm({ onOk: onOkCallback, onCancel, isOpen }: Props) {
         ],
       };
       const team = await createTeam(newTeam);
+      form.resetFields();
       onOkCallback(team);
     });
   };
 
+  const onCancel = () => {
+    form.resetFields();
+    onCancelCallback();
+  };
+
   return (
     <Modal open={isOpen} title="Add a New Team" okText="Ok" onCancel={onCancel} onOk={onOk}>
       <Shortcut keys="enter" onTrigger={onOk} supportInputElements />

unreleased_changes/9009.md

@@ -0,0 +1,2 @@
+### Fixed
+- The modal to create a new team now always displays an empty input field when opened, preventing any previously entered text from appearing.