Implement continuous tape labels and path-based label shapes.

- Added "roll" as a special paper id
- Added roll_width attribute to draw tape in previews
- Updated Brother QL-500/* label templates
- Preserve print dialog settings between print jobs.
- Added path based labels for arbitrary shaped labels.
- Fleshed out implementation of continuous labels.

glabels/TemplateDesigner.h

@@ -30,6 +30,8 @@
 #include "ui_TemplateDesignerRoundPage.h"
 #include "ui_TemplateDesignerEllipsePage.h"
 #include "ui_TemplateDesignerCdPage.h"
+#include "ui_TemplateDesignerPathPage.h"
+#include "ui_TemplateDesignerContinuousPage.h"
 #include "ui_TemplateDesignerNLayoutsPage.h"
 #include "ui_TemplateDesignerOneLayoutPage.h"
 #include "ui_TemplateDesignerTwoLayoutPage.h"
@@ -59,6 +61,8 @@ namespace glabels
 		friend class TemplateDesignerRoundPage;
 		friend class TemplateDesignerEllipsePage;
 		friend class TemplateDesignerCdPage;
+		friend class TemplateDesignerPathPage;
+		friend class TemplateDesignerContinuousPage;
 		friend class TemplateDesignerNLayoutsPage;
 		friend class TemplateDesignerOneLayoutPage;
 		friend class TemplateDesignerTwoLayoutPage;
@@ -92,7 +96,9 @@ namespace glabels
 		// Private methods
 		/////////////////////////////////
 	private:
-		bool mIsBasedOnCopy;
+		bool mIsBasedOnCopy{false};
+		bool mIsTemplatePathBased{false};
+		bool mIsTemplateContinuousBased{false};
 	};
 
 
@@ -220,6 +226,32 @@ namespace glabels
 	};
 
 
+	//
+	// Path Page
+	//
+	class TemplateDesignerPathPage : public QWizardPage, public Ui::TemplateDesignerPathPage
+	{
+		Q_OBJECT
+	public:
+		TemplateDesignerPathPage( QWidget* parent = nullptr );
+
+		bool isComplete() const override;
+	};
+
+
+	//
+	// Continuous Page
+	//
+	class TemplateDesignerContinuousPage : public QWizardPage, public Ui::TemplateDesignerContinuousPage
+	{
+		Q_OBJECT
+	public:
+		TemplateDesignerContinuousPage( QWidget* parent = nullptr );
+
+		bool isComplete() const override;
+	};
+
+
 	//
 	// NLayouts Page
 	//