fix: Properly saving tasks

Tasks were not properly saved by the JsonTaskList, resulting in the newly created tasks being discarded immediately. Fixed by putting them into the taskMap in saveTask()

src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskList.java

@@ -106,6 +106,7 @@ public class JsonTaskList implements TaskList {
         if(task.getId() == 0) {
             task.withId(idProvider.incrementAndGet());
         }
+        taskMap.put(task.getId(), task);
         writeTaskListToFile();
     }
 

src/main/resources/ch/zhaw/gartenverwaltung/io/plantdb.json

@@ -184,15 +184,14 @@
           "litersPerSqM": 15,
           "interval": 4,
           "notes": [
-
           ]
         },
         "taskTemplates": [
           {
-            "name": "hilling",
+            "name": "Plant Sets",
             "relativeStartDate": 0,
             "relativeEndDate": 0,
-            "description": "Mound up the soil around the plant until just the top few leaves show above the soil. ",
+            "description": "Plant the sets about 5cm deep into the soil.",
             "interval": null,
             "isOptional": false
           }
@@ -232,7 +231,6 @@
           "litersPerSqM": 0,
           "interval": null,
           "notes": [
-
           ]
         },
         "taskTemplates": [