Reimplement coherent updating

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/model/FileInfo.java

@@ -24,7 +24,7 @@ public class FileInfo {
     @Getter(AccessLevel.NONE)
     private final List<TrackAttributes> subtitleTracks = new ArrayList<>();
 
-    private final PlannedChange changes = new PlannedChange();
+    private PlannedChange changes = new PlannedChange();
     @Setter
     private AttributeConfig matchedConfig;
 
@@ -50,6 +50,10 @@ public class FileInfo {
         return Collections.unmodifiableList(subtitleTracks);
     }
 
+    public void resetChanges() {
+        changes = new PlannedChange();
+    }
+
     public FileStatus getStatus() {
         if (!changes.isEmpty()) return FileStatus.CHANGE_NECESSARY;
         if (matchedConfig == null) return FileStatus.NO_SUITABLE_CONFIG;