Implement sub habit reordering within group

uhabits-core/src/jvmMain/java/org/isoron/uhabits/core/ui/screens/habits/list/HabitCardListCache.kt

@@ -259,10 +259,11 @@ class HabitCardListCache @Inject constructor(
     @Synchronized
     fun reorder(from: Int, to: Int) {
         if (from == to) return
-        if (data.positionTypes[from] == STANDALONE_HABIT) {
+        val type = data.positionTypes[from]
+        if (type == STANDALONE_HABIT || type == SUB_HABIT) {
             val habit = data.positionToHabit[from]!!
             data.performMove(habit, from, to)
-        } else if (data.positionTypes[from] == HABIT_GROUP) {
+        } else {
             val habitGroup = data.positionToHabitGroup[from]!!
             data.performMove(habitGroup, from, to)
         }

uhabits-core/src/jvmMain/java/org/isoron/uhabits/core/ui/screens/habits/list/ListHabitsBehavior.kt

@@ -112,7 +112,10 @@ open class ListHabitsBehavior @Inject constructor(
     }
 
     fun onReorderHabit(from: Habit, to: Habit) {
-        taskRunner.execute { habitList.reorder(from, to) }
+        if (from.parent == to.parent) {
+            val list = from.parent?.habitList ?: habitList
+            taskRunner.execute { list.reorder(from, to) }
+        }
     }
 
     fun onRepairDB() {