GUI: move shared enums to 'GUI/Support/Data/ID.h'

Joins three homeless enums in GUI/Support/Data/ID.h

This resolves #447 (closed)

GUI/Model/Data/ProjectionItems.cpp

@@ -20,11 +20,11 @@ ProjectionContainerItem::ProjectionContainerItem()
 {
 }
 
-QVector<MaskItem*> ProjectionContainerItem::projectionsOfType(ProjectionType projectionType)
+QVector<MaskItem*> ProjectionContainerItem::projectionsOfType(GUI::ID::ProjectionType projectionType)
 {
-    if (projectionType == ProjectionType::Horizontal)
+    if (projectionType == GUI::ID::ProjectionType::Horizontal)
         return projections<HorizontalLineItem>();
-    else if (projectionType == ProjectionType::Vertical)
+    else if (projectionType == GUI::ID::ProjectionType::Vertical)
         return projections<VerticalLineItem>();
     else
         ASSERT(false);