ui: Extended project setup to support creation and editing of Source Groups (issue #230)

* Turned QtProjectWizzard into window for Source Group ui
* Clicking into FilePicker when empty will open dialog right away
* Fixed environment variable use throughout all Source Group path values
* Moved Preferences to QtPreferencesWindow

bug id = 230

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src/lib_gui/qt/element/QtLocationPicker.cpp

@@ -26,6 +26,7 @@ QtLocationPicker::QtLocationPicker(QWidget *parent)
 	m_data->setAttribute(Qt::WA_MacShowFocusRect, 0);
 	m_data->setObjectName("locationField");
 	layout->addWidget(m_data);
+	connect(m_data, SIGNAL(focus()), this, SLOT(handleFocus()));
 
 	m_button = new QtIconButton(
 		(ResourcePaths::getGuiPath().str() + "window/dots.png").c_str(),
@@ -68,6 +69,11 @@ void QtLocationPicker::clearText()
 	m_data->clear();
 }
 
+bool QtLocationPicker::pickDirectory() const
+{
+	return m_pickDirectory;
+}
+
 void QtLocationPicker::setPickDirectory(bool pickDirectory)
 {
 	m_pickDirectory = pickDirectory;
@@ -119,3 +125,11 @@ void QtLocationPicker::handleButtonPress()
 		emit locationPicked();
 	}
 }
+
+void QtLocationPicker::handleFocus()
+{
+	if (!m_data->text().size())
+	{
+		handleButtonPress();
+	}
+}