Add naive Windows Java detection - JavaUtils for finding it on other systems (incomplete)

gui/settingsdialog.cpp

@@ -13,10 +13,11 @@
  * limitations under the License.
  */
 
+#include <MultiMC.h>
 #include "settingsdialog.h"
 #include "ui_settingsdialog.h"
+#include "logic/JavaUtils.h"
 
-#include <MultiMC.h>
 #include <settingsobject.h>
 #include <QFileDialog>
 #include <QMessageBox>
@@ -180,3 +181,11 @@ void SettingsDialog::loadSettings(SettingsObject *s)
 	ui->preLaunchCmdTextBox->setText(s->get("PreLaunchCommand").toString());
 	ui->postExitCmdTextBox->setText(s->get("PostExitCommand").toString());
 }
+
+void SettingsDialog::on_pushButton_clicked()
+{
+	JavaUtils jut;
+	QStringList paths = jut.FindJavaPath();
+
+	ui->javaPathTextBox->setText(paths.at(0));
+}

gui/settingsdialog.h

@@ -53,6 +53,8 @@ private slots:
 	
 	void on_buttonBox_accepted();
 	
+	void on_pushButton_clicked();
+
 private:
 	Ui::SettingsDialog *ui;
 };

gui/settingsdialog.ui

@@ -33,7 +33,7 @@
       <enum>QTabWidget::Rounded</enum>
      </property>
      <property name="currentIndex">
-      <number>0</number>
+      <number>2</number>
      </property>
      <widget class="QWidget" name="generalTab">
       <attribute name="title">