main/postmarketos-ui-lxqt: increase window buttons size (MR 6068)

At first fix issue #3315 caused by config file snippet openbox/rc.xml. The
snippet results in unresponsive window headers after changing the Openbox
theme. The Openbox settings GUI ObConf-Qt is not set up to handle config
snippets. Therefore replace the snippet by the full file of openbox/rc.xml.
The issue was investigated at:
https://github.com/Mikachu/openbox/issues/23

Secondly custom Openbox themes of dark style Onyx and bright style Clearlooks
with larger window buttons are added.

Thirdly the default Openbox theme is set to custom Clearlooks with larger
window buttons and additionally the Openbox font size is increased.

Detailed changelog of GitLab repository antoni.aloytorrens/lxqt-tablet:
- Increase Openbox font sizes
- Set default Openbox theme to "Clearlooks-L" with larger buttons
- Add custom Openbox themes Clearlooks with larger window buttons
- Add custom Openbox themes Onyx with larger window buttons
- Set the number of desktops to two again
- Restore full openbox/rc.xml config file
[ci:skip-build]: already built successfully in CI

main/postmarketos-ui-lxqt/APKBUILD

@@ -1,8 +1,8 @@
 # Reference: https://postmarketos.org/uipkg
 # Maintainer: Antoni Aloy <aaloytorrens@gmail.com>
 pkgname=postmarketos-ui-lxqt
-pkgver=0.3
-pkgrel=5
+pkgver=0.4
+pkgrel=0
 pkgdesc="(X11) Lightweight Qt Desktop Environment (stylus recommended)"
 url="https://lxqt-project.org/"
 # armhf: lxqt-desktop not available
@@ -65,6 +65,9 @@ package() {
 	mkdir -p "$pkgdir"/etc/xdg
 	cp -a "$builddir"/config "$pkgdir"/etc/xdg/lxqt-tablet
 
+	mkdir -p "$pkgdir"/usr/share/themes
+	cp -a "$builddir"/openbox-themes/* "$pkgdir"/usr/share/themes/.
+
 	install -Dm644 -t "$pkgdir"/etc/xdg/lxqt-tablet/autostart \
 		"$srcdir"/lxqt-xscreensaver-autostart.desktop \
 		"$srcdir"/onboard-autostart.desktop \
@@ -96,7 +99,7 @@ openrc() {
 }
 
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