mobile/UI: improve theming of title bar

We do theming very differently from what Kirigami intended. Mostly
that's because our code predates theirs. But also because Kirigami wants
and app to simply use an OS theme - whereas we want to be able to
provide different looks, independent from the OS theme.
Ideally we'd still use the existing methods to change the colors and
sizes of Kirigami UI elements, but for now this hack helps improve
readability of the title bar.

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

mobile-widgets/3rdparty/0007-breadcrumbs-deal-with-incorrect-height-of-title-bar.patch

@@ -1,34 +1,44 @@
-From 766da540c8859cc0983b73726dab3ce743109c16 Mon Sep 17 00:00:00 2001
+From 59e39f536be6a646b93ad6403aa375ec7ec4181b Mon Sep 17 00:00:00 2001
 From: Dirk Hohndel <dirk@hohndel.org>
 Date: Thu, 3 Dec 2020 13:51:36 -0800
-Subject: [PATCH 07/11] breadcrumbs: deal with incorrect height of title bar
+Subject: [PATCH 7/11] improve the title bar visual
 
-I can see that the Kirigami developers have made changes here, but
-this still doesn't work without that invisible element.
+Subsurface doesn't do theming the way Kirigami intends us to do this.
+Part of the reason is that our original approach pre-dates Kirigami
+doing this at all, part of it is that we want to allow theme changes
+independent from the OS which doesn't seem to be something that the
+Kirigami developers have considered.
+I'm sure we could do a better job using what is available in Kirigami,
+this seems a little brute force, but it works.
 
-This also hardcodes our background color for the title bar as that
-theming always goes wrong.
+This commit hard codes some colors to use the ones from the Subsurface
+theme (which is of course the wrong thing to do for a generic library),
+makes sure we find the icons, and makes sure that size of the title bar
+stays correct.
 
 Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
+
 ---
- .../globaltoolbar/PageRowGlobalToolBarUI.qml   | 18 +++++++++++++++---
+ .../globaltoolbar/PageRowGlobalToolBarUI.qml  | 22 +++++++++++++++----
  src/controls/templates/private/BackButton.qml |  1 +
  .../templates/private/ForwardButton.qml       |  1 +
- 3 files changed, 17 insertions(+), 3 deletions(-)
+ 3 files changed, 20 insertions(+), 4 deletions(-)
 
 diff --git a/src/controls/private/globaltoolbar/PageRowGlobalToolBarUI.qml b/src/controls/private/globaltoolbar/PageRowGlobalToolBarUI.qml
-index 4404faae..e0b26e88 100644
+index 4404faae..afbfce89 100644
 --- a/src/controls/private/globaltoolbar/PageRowGlobalToolBarUI.qml
 +++ b/src/controls/private/globaltoolbar/PageRowGlobalToolBarUI.qml
-@@ -28,6 +28,7 @@ Kirigami.AbstractApplicationHeader {
-     preferredHeight: globalToolBar.preferredHeight
+@@ -29,12 +29,23 @@ Kirigami.AbstractApplicationHeader {
      maximumHeight: globalToolBar.maximumHeight
      separatorVisible: globalToolBar.separatorVisible
-+    background: Rectangle { color: subsurfaceTheme.primaryColor }
  
-     Kirigami.Theme.textColor: currentItem ? currentItem.Kirigami.Theme.textColor : parent.Kirigami.Theme.textColor
+-    Kirigami.Theme.textColor: currentItem ? currentItem.Kirigami.Theme.textColor : parent.Kirigami.Theme.textColor
++    // provide consistent color for the Subsurface title bar - I couldn't figure
++    // how to do this without modifying Kirigami itself
++    Kirigami.Theme.backgroundColor: subsurfaceTheme.primaryColor
++    Kirigami.Theme.textColor: subsurfaceTheme.primaryTextColor
  
-@@ -35,6 +36,14 @@ Kirigami.AbstractApplicationHeader {
+     RowLayout {
          anchors.fill: parent
          spacing: 0
  
@@ -43,7 +53,7 @@ index 4404faae..e0b26e88 100644
          Item {
              id: leftHandleAnchor
              visible: (typeof applicationWindow() !== "undefined" && applicationWindow().globalDrawer && applicationWindow().globalDrawer.enabled && applicationWindow().globalDrawer.handleVisible &&
-@@ -67,6 +76,7 @@ Kirigami.AbstractApplicationHeader {
+@@ -67,6 +78,7 @@ Kirigami.AbstractApplicationHeader {
              Layout.fillHeight: true
  
              Layout.leftMargin: leftHandleAnchor.visible ? Kirigami.Units.smallSpacing : 0
@@ -51,7 +61,7 @@ index 4404faae..e0b26e88 100644
  
              visible: (globalToolBar.showNavigationButtons != Kirigami.ApplicationHeaderStyle.NoNavigationButtons || root.layers.depth > 0) && (globalToolBar.actualStyle != Kirigami.ApplicationHeaderStyle.None)
  
-@@ -76,16 +86,18 @@ Kirigami.AbstractApplicationHeader {
+@@ -76,16 +88,18 @@ Kirigami.AbstractApplicationHeader {
                  id: backButton
                  Layout.leftMargin: leftHandleAnchor.visible ? 0 : Kirigami.Units.smallSpacing
                  Layout.preferredWidth: height
@@ -72,7 +82,7 @@ index 4404faae..e0b26e88 100644
          }
  
          Loader {
-@@ -124,6 +136,6 @@ Kirigami.AbstractApplicationHeader {
+@@ -124,6 +138,6 @@ Kirigami.AbstractApplicationHeader {
              Layout.preferredWidth: height
          }
      }