mobile/UI: correctly update title bar font size

Simply force it to use the default font, which is bound to the
application font, which we SHOULD be updating when changing the regular
font size for the app, anyway.

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

mobile-widgets/3rdparty/0005-breadcrumbs-get-better-font-size.patch

@@ -5,26 +5,9 @@ Subject: [PATCH 05/11] breadcrumbs: get better font size
 
 Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
 ---
- src/controls/Units.qml                                   | 5 +++++
  src/controls/private/globaltoolbar/BreadcrumbControl.qml | 1 +
- 2 files changed, 6 insertions(+)
+ 1 file changed, 1 insertion(+)
 
-diff --git a/src/controls/Units.qml b/src/controls/Units.qml
-index 615228a2..f957046f 100644
---- a/src/controls/Units.qml
-+++ b/src/controls/Units.qml
-@@ -105,6 +105,11 @@ QtObject {
-      */
-     readonly property int wheelScrollLines: 3
- 
-+    /**
-+     * Use this to hardcode the font size of the global toolbar that Kirigami gets wrong
-+     */
-+    property double defaultFontSize: fontMetrics.font.pixelSize
-+
-     /**
-      * metrics used by the default font
-      */
 diff --git a/src/controls/private/globaltoolbar/BreadcrumbControl.qml b/src/controls/private/globaltoolbar/BreadcrumbControl.qml
 index ad80d222..c45db280 100644
 --- a/src/controls/private/globaltoolbar/BreadcrumbControl.qml
@@ -33,7 +16,7 @@ index ad80d222..c45db280 100644
                      }
                      Kirigami.Heading {
                          Layout.leftMargin: Kirigami.Units.largeSpacing
-+                        font.pixelSize: Math.max(1, Kirigami.Units.defaultFontSize)
++                        font: Kirigami.Theme.defaultFont
                          color: Kirigami.Theme.textColor
                          verticalAlignment: Text.AlignVCenter
                          wrapMode: Text.NoWrap

mobile-widgets/qml/main.qml

@@ -665,9 +665,16 @@ if you have network connectivity and want to sync your data to cloud storage."),
 		}
 	}
 
+	property double regularFontsize: subsurfaceTheme.regularPointSize
+
 	FontMetrics {
 		id: fontMetrics
-		font.pointSize: subsurfaceTheme.regularPointSize
+		font.pointSize: regularFontsize
+	}
+
+	onRegularFontsizeChanged: {
+		manager.appendTextToLog("regular font size changed to " + regularFontsize)
+		rootItem.font.pointSize = regularFontsize
 	}
 
 	function setupUnits() {