Move subsurface-core to core and qt-mobile to mobile-widgets

Having subsurface-core as a directory name really messes with
autocomplete and is obviously redundant. Simmilarly, qt-mobile caused an
autocomplete conflict and also was inconsistent with the desktop-widget
name for the directory containing the "other" UI.

And while cleaning up the resulting change in the path name for include
files, I decided to clean up those even more to make them consistent
overall.

This could have been handled in more commits, but since this requires a
make clean before the build, it seemed more sensible to do it all in one.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

mobile-widgets/qml/ThemeTest.qml

@@ -0,0 +1,115 @@
+import QtQuick 2.5
+import QtQuick.Controls 1.4
+import QtQuick.Layouts 1.1
+import QtQuick.Window 2.2
+import org.kde.kirigami 1.0 as Kirigami
+
+Kirigami.Page {
+
+	title: "Theme Information"
+/* this can be done by hitting the back key
+	contextualActions: [
+		Action {
+			text: "Close Theme info"
+			iconName: "dialog-cancel"
+			onTriggered: {
+				stackView.pop()
+				contextDrawer.close()
+			}
+		}
+	]
+ */
+	GridLayout {
+		id: themetest
+		columns: 2
+		anchors.margins: Kirigami.Units.gridUnit / 2
+
+		Kirigami.Heading {
+			Layout.columnSpan: 2
+			text: "Theme Information"
+		}
+
+		Kirigami.Heading {
+			text: "Screen"
+			Layout.columnSpan: 2
+			level: 3
+		}
+		FontMetrics {
+			id: fm
+		}
+
+		Kirigami.Label {
+			text: "Geometry (pixels):"
+		}
+		Kirigami.Label {
+			text: rootItem.width + "x" + rootItem.height
+		}
+
+		Kirigami.Label {
+			text: "Geometry (gridUnits):"
+		}
+		Kirigami.Label {
+			text: Math.round(rootItem.width / Kirigami.Units.gridUnit) + "x" + Math.round(rootItem.height / Kirigami.Units.gridUnit)
+		}
+
+		Kirigami.Label {
+			text: "Units.gridUnit:"
+		}
+		Kirigami.Label {
+			text: Kirigami.Units.gridUnit
+		}
+
+		Kirigami.Label {
+			text: "Units.devicePixelRatio:"
+		}
+		Kirigami.Label {
+			text: Screen.devicePixelRatio
+		}
+
+		Kirigami.Heading {
+			text: "Font Metrics"
+			level: 3
+			Layout.columnSpan: 2
+		}
+
+		Kirigami.Label {
+			text: "FontMetrics pointSize:"
+		}
+		Kirigami.Label {
+			text: fm.font.pointSize
+		}
+
+		Kirigami.Label {
+			text: "FontMetrics pixelSize:"
+		}
+		Kirigami.Label {
+			text: fm.height
+		}
+
+		Kirigami.Label {
+			text: "FontMetrics devicePixelRatio:"
+		}
+		Kirigami.Label {
+			text: fm.height / fm.font.pointSize
+		}
+
+		Kirigami.Label {
+			text: "Text item pixelSize:"
+		}
+		Text {
+			text: font.pixelSize
+		}
+
+		Kirigami.Label {
+			text: "Text item pointSize:"
+		}
+		Text {
+			text: font.pointSize
+		}
+
+		Kirigami.Label {
+			Layout.columnSpan: 2
+			Layout.fillHeight: true
+		}
+	}
+}