cs-info: Add system icon (#11090)

* cs-info: Add system icon

A vendor can disable this. It simply adds a Gtk Image under
the system info data which can be configured
by a gschema.

Author: JPeisach

data/org.cinnamon.gschema.xml

@@ -501,7 +501,18 @@
       <summary>If true, Cinnamon will no longer attempt to be the session notification handler.</summary>
     </key>
 
-    <child name="theme" schema="org.cinnamon.theme"/>   
+    <key type="s" name="system-icon-path">
+      <default>"/usr/share/icons/vendor/scalable/emblems/emblem-vendor.svg"</default>
+      <summary>The logo to use in the system info settings</summary>
+      <description>
+        An icon name or absolute path to an icon, which will be used for the system icon in the "System Info" settings app.
+        The default path is the emblem-vendor image stored in /usr/share/icons/vendor.
+        .
+        Disabled if no value is set.
+      </description>
+    </key>
+
+    <child name="theme" schema="org.cinnamon.theme"/>
     <child name="recorder" schema="org.cinnamon.recorder"/>
     <child name="keyboard" schema="org.cinnamon.keyboard"/>
     <child name="desklets" schema="org.cinnamon.desklets" />

files/usr/share/cinnamon/cinnamon-settings/modules/cs_info.py

@@ -93,6 +93,16 @@ def getProcInfos():
     return result
 
 
+def getSystemIcon():
+    schema = Gio.Settings(schema="org.cinnamon")
+
+    iconPath = schema.get_string("system-icon-path")
+    if iconPath is "":  # left empty, so its disabled
+        return None
+
+    return iconPath
+
+
 def createSystemInfos():
     procInfos = getProcInfos()
     infos = []
@@ -203,6 +213,12 @@ def on_module_selected(self):
                 button.connect("clicked", self.on_copy_clipboard_button_clicked)
                 widget.pack_start(button, True, True, 0)
                 settings.add_row(widget)
+
+            systemIconPath = getSystemIcon()
+            if systemIconPath is not None:
+                systemIcon = Gtk.Image.new_from_file(systemIconPath)
+                page.add(systemIcon)
+
 
     def on_copy_clipboard_button_clicked(self, button):
         try: