fix: error while parsing form java source file

Ref: FormGuardedBlockError #482

Guarded blocks inside form java source file archive
http://wiki.netbeans.org/FormGuardedBlockError
[archive](https://web.archive.org/web/20090322044239/http://wiki.netbeans.org/FormGuardedBlockError)

Netbeans GUI Form corrupted?
https://stackoverflow.com/questions/2076235/netbeans-gui-form-corrupted

src/main/java/de/danielluedecke/zettelkasten/ZettelkastenView.java

@@ -98,6 +98,7 @@
  */
 public class ZettelkastenView extends FrameView implements WindowListener, DropTargetListener {
 
+	// <editor-fold defaultstate="collapsed" desc="Variablendeklaration">
 	/**
 	 * searchRequests manages all searches and searchresults for the loaded
 	 * datafile.
@@ -11348,7 +11349,9 @@ public void setHistoryBackAvailable(boolean b) {
 	 * @throws InstantiationException
 	 * @throws ClassNotFoundException
 	 */
-	// GEN-BEGIN:initComponents
+	@SuppressWarnings("unchecked")
+	// <editor-fold defaultstate="collapsed" desc="Generated
+	// Code">//GEN-BEGIN:initComponents
 	private void initComponents() throws ClassNotFoundException, InstantiationException, IllegalAccessException,
 			UnsupportedLookAndFeelException {
 
@@ -14428,9 +14431,10 @@ public void actionPerformed(java.awt.event.ActionEvent evt) {
 		setMenuBar(menuBar);
 		setStatusBar(statusPanel);
 		setToolBar(toolBar);
-	}// GEN-END:initComponents
+	}// </editor-fold>//GEN-END:initComponents
 
 	private void viewAuthorsCopyActionPerformed(java.awt.event.ActionEvent evt) {// GEN-FIRST:event_viewAuthorsCopyActionPerformed
+		// TODO add your handling code here:
 	}// GEN-LAST:event_viewAuthorsCopyActionPerformed
 
 	/**