added spacing at the end of the form and delete button for alarms

lib/pages/task_edit_page.dart

@@ -168,7 +168,10 @@ class _TaskEditPageState extends State<TaskEditPage> {
                       icon: Icon(Icons.location_on),
                     ),
                     for (final (index, alarmRequest) in alarmRequests.indexed)
-                      AlarmForm(
+                      Row(
+                        children: [
+                          Expanded(
+                            child: AlarmForm(
                               request: alarmRequest,
                               onChanged: (updated) {
                                 setState(() {
@@ -176,6 +179,16 @@ class _TaskEditPageState extends State<TaskEditPage> {
                                 });
                               },
                             ),
+                          ),
+                          IconButton(
+                            onPressed: () => setState(() {
+                              alarmRequests.removeAt(index);
+                            }),
+                            icon: Icon(Icons.close),
+                          ),
+                        ],
+                      ),
+                    SizedBox(height: 120),
                   ],
                 ),
               ],
@@ -191,6 +204,7 @@ class _TaskEditPageState extends State<TaskEditPage> {
   }
 
   void onSavePressed() {
+    if (formKey.currentState!.validate()) {
       Navigator.of(context).pop(
         CreateTaskRequest(
           title: titleController.text,
@@ -218,6 +232,7 @@ class _TaskEditPageState extends State<TaskEditPage> {
         ),
       );
     }
+  }
 
   void onPopInvoked(bool didPop, Object? result) {
     if (!didPop) {

lib/widgets/alarm_widgets/fixed_time_alarm_form.dart

@@ -69,7 +69,9 @@ class _FixedTimeAlarmFormState extends State<FixedTimeAlarmForm> {
                 icon: Icon(Icons.calendar_month),
               ),
             ),
-            validator: dateTimeValidator,
+            validator: (value) {
+              return notEmptyValidator(value) ?? dateTimeValidator(value);
+            },
             keyboardType: TextInputType.datetime,
             textInputAction: TextInputAction.next,
           ),