calamares: added background to installer and adjusted prepare settings

calamares/branding/openmamba/show.qml

@@ -31,6 +31,13 @@ Presentation
     }
 
     Slide {
+        Image {
+            id: background01
+            source: "background.jpg"
+            width: 1920; height: 1200
+            fillMode: Image.PreserveAspectFit
+            anchors.centerIn: parent
+        }
         Image {
             id: background1
             source: "desktop-kde-300x225.jpg"
@@ -59,6 +66,13 @@ Presentation
     }
 
     Slide {
+        Image {
+            id: background02
+            source: "background.jpg"
+            width: 1920; height: 1200
+            fillMode: Image.PreserveAspectFit
+            anchors.centerIn: parent
+        }
         Image {
             id: background2
             source: "desktop-lxde-300x225.jpg"
@@ -87,6 +101,13 @@ Presentation
     }
 
     Slide {
+        Image {
+            id: background03
+            source: "background.jpg"
+            width: 1920; height: 1200
+            fillMode: Image.PreserveAspectFit
+            anchors.centerIn: parent
+        }
         Image {
             id: background3
             source: "desktop-gnome-300x225.jpg"

calamares/modules/prepare.conf

@@ -1,11 +1,11 @@
 ---
-requiredStorage:    5.5
-requiredRam:        1.0
+requiredStorage:    5.0
+requiredRam:        0.5
 check:
     - storage
     - ram
     - power
-    - internet
+#    - internet
 required:
 #    - storage
     - ram