Small fixes, including release dates of some legacy versions

gui/MainWindow.ui

@@ -116,6 +116,7 @@
    <addaction name="actionScreenshots"/>
    <addaction name="separator"/>
    <addaction name="actionEditInstance"/>
+   <addaction name="actionInstance_Settings"/>
    <addaction name="actionViewSelectedInstFolder"/>
    <addaction name="actionConfig_Folder"/>
    <addaction name="separator"/>
@@ -488,6 +489,14 @@
     <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;View and upload screenshots for this instance&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
    </property>
   </action>
+  <action name="actionInstance_Settings">
+   <property name="text">
+    <string>Instance Settings</string>
+   </property>
+   <property name="toolTip">
+    <string>Change the settings specific to the instance</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources>

gui/dialogs/SettingsDialog.cpp

@@ -38,6 +38,15 @@
 #include <QMessageBox>
 #include <QDir>
 
+// FIXME: possibly move elsewhere
+enum InstSortMode
+{
+	// Sort alphabetically by name.
+	Sort_Name,
+	// Sort by which instance was launched most recently.
+	Sort_LastLaunch
+};
+
 SettingsDialog::SettingsDialog(QWidget *parent) : QDialog(parent), ui(new Ui::SettingsDialog)
 {
 	MultiMCPlatform::fixWM_CLASS(this);