Add Quit button to error dialog

src/mcedit2/dialogs/error_dialog.py

@@ -60,9 +60,12 @@ class ErrorDialog(QtGui.QDialog):
 
         self.restartMCEditLabel.setVisible(fatal)
 
-        self.restartMCEditButton.setEnabled(fatal)
+        self.restartMCEditButton.setVisible(fatal)
         self.restartMCEditButton.clicked.connect(self.restartMCEdit)
 
+        self.quitMCEditButton.setVisible(fatal)
+        self.quitMCEditButton.clicked.connect(self.quitMCEdit)
+
         try:
             import Pastebin
         except ImportError:
@@ -108,4 +111,7 @@ class ErrorDialog(QtGui.QDialog):
 
     def restartMCEdit(self):
         QtCore.QProcess.startDetached(sys.executable, sys.argv)
-        raise SystemExit  # xxxxxxxxxxx
+        raise SystemExit
+
+    def quitMCEdit(self):
+        raise SystemExit

src/mcedit2/ui/error_dialog.ui

@@ -114,6 +114,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QPushButton" name="quitMCEditButton">
+       <property name="text">
+        <string>Quit</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <widget class="QPushButton" name="continueButton">
        <property name="text">