update backgrounds/themes for Debian 11 (xfce4-desktop, GRUB (UEFI), isolinux (BIOS), lightdm, plymouth)

- update isolinux menu text

config/includes.chroot/etc/lightdm/lightdm-gtk-greeter.conf

@@ -45,7 +45,7 @@
 #  transition-duration = overrides default value
 #
 [greeter]
-background = /usr/share/backgrounds/futureprototype-darker-4096x2160.svg
+background = /usr/share/backgrounds/homeworld-darker-3840x2160.png
 user-background = false
 theme-name = Arc-Darker
 icon-theme-name = Papirus

config/includes.chroot/etc/plymouth/plymouthd.conf

@@ -0,0 +1,3 @@
+# Administrator customizations go in this file
+[Daemon]
+Theme=homeworld

config/includes.chroot/etc/skel/.config/xfce4/desktop/backdrop.list

@@ -1,2 +1,2 @@
 # xfce backdrop list
-/usr/share/backgrounds/futureprototype-darker-4096x2160.svg
+/usr/share/backgrounds/homeworld-darker-3840x2160.png

config/includes.chroot/etc/skel/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-desktop.xml

@@ -4,19 +4,19 @@
   <property name="backdrop" type="empty">
     <property name="screen0" type="empty">
       <property name="monitor0" type="empty">
-        <property name="image-path" type="string" value="/usr/share/backgrounds/futureprototype-darker-4096x2160.svg"/>
+        <property name="image-path" type="string" value="/usr/share/backgrounds/homeworld-darker-3840x2160.png"/>
         <property name="image-show" type="bool" value="true"/>
-        <property name="last-single-image" type="string" value="/usr/share/backgrounds/futureprototype-darker-4096x2160.svg"/>
+        <property name="last-single-image" type="string" value="/usr/share/backgrounds/homeworld-darker-3840x2160.png"/>
         <property name="backdrop-cycle-enable" type="bool" value="true"/>
         <property name="backdrop-cycle-timer" type="uint" value="600"/>
         <property name="image-style" type="int" value="0"/>
         <property name="workspace0" type="empty">
           <property name="image-style" type="int" value="3"/>
-          <property name="last-image" type="string" value="/usr/share/backgrounds/futureprototype-darker-4096x2160.svg"/>
+          <property name="last-image" type="string" value="/usr/share/backgrounds/homeworld-darker-3840x2160.png"/>
         </property>
         <property name="workspace1" type="empty">
           <property name="image-style" type="int" value="3"/>
-          <property name="last-image" type="string" value="/usr/share/backgrounds/futureprototype-darker-4096x2160.svg"/>
+          <property name="last-image" type="string" value="/usr/share/backgrounds/homeworld-darker-3840x2160.png"/>
         </property>
       </property>
     </property>