Fix tag filter

app/src/main/java/com/kunzisoft/keepass/activities/GroupActivity.kt

@@ -666,7 +666,7 @@ class GroupActivity : DatabaseLockActivity(),
             searchFiltersView?.setNumbers(group.numberOfChildEntries)
             searchFiltersView?.setCurrentGroupText(mMainGroup?.title ?: "")
             searchFiltersView?.enableOther(mDatabase?.allowEntryCustomFields() ?: false)
-            searchFiltersView?.enableTags(mDatabase?.tagPool?.isEmpty() ?: false)
+            searchFiltersView?.enableTags(mDatabase?.tagPool?.isNotEmpty() ?: false)
             searchFiltersView?.enableTemplates(mDatabase?.templatesGroup != null)
             toolbarBreadcrumb?.navigationIcon = null
         } else {

app/src/main/java/com/kunzisoft/keepass/database/element/Tags.kt

@@ -53,6 +53,10 @@ class Tags: Parcelable {
         return mTags.isEmpty()
     }
 
+    fun isNotEmpty(): Boolean {
+        return !isEmpty()
+    }
+
     fun size(): Int {
         return mTags.size
     }

app/src/main/java/com/kunzisoft/keepass/database/element/database/DatabaseKDBX.kt

@@ -224,7 +224,7 @@ class DatabaseKDBX : DatabaseVersioned<UUID, UUID, GroupKDBX, EntryKDBX> {
     private inner class GroupOperationHandler: NodeOperationHandler<GroupKDBX>() {
         var containsTags = false
         override fun operate(node: GroupKDBX): Boolean {
-            if (!node.tags.isEmpty())
+            if (node.tags.isNotEmpty())
                 containsTags = true
             return super.operate(node)
         }

app/src/main/java/com/kunzisoft/keepass/database/file/output/DatabaseOutputKDBX.kt

@@ -663,7 +663,7 @@ class DatabaseOutputKDBX(private val mDatabaseKDBX: DatabaseKDBX,
 
     @Throws(IllegalArgumentException::class, IllegalStateException::class, IOException::class)
     private fun writeTags(tags: Tags) {
-        if (!tags.isEmpty()) {
+        if (tags.isNotEmpty()) {
             writeString(DatabaseKDBXXML.ElemTags, tags.toString())
         }
     }