[Glitch] Rewrite actions/modal and reducers/modal with typescript

Port 38c6216082 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/components/edited_timestamp/index.jsx

@@ -15,7 +15,10 @@ import DropdownMenu from './containers/dropdown_menu_container';
 const mapDispatchToProps = (dispatch, { statusId }) => ({
 
   onItemClick (index) {
-    dispatch(openModal('COMPARE_HISTORY', { index, statusId }));
+    dispatch(openModal({
+      modalType: 'COMPARE_HISTORY',
+      modalProps: { index, statusId },
+    }));
   },
 
 });