frontpage: Cleanup urls for showing description

In a module, when URL is not avialable for a shortcut, send None instead
of an implementation specific detail on how to show description.  This
allows use to change the implementation of how description is shown
without changes to modules.

plinth/frontpage.py

@@ -29,6 +29,9 @@ def get_shortcuts():
 
 def add_shortcut(id, label, url, icon, details=None):
     """Add shortcut to front page."""
+    if not url:
+        url = '?selected={id}'.format(id=id)
+
     shortcuts[id] = {
         'id': id,
         'label': label,

plinth/modules/minetest/__init__.py

@@ -74,8 +74,8 @@ def setup(helper, old_version=None):
 
 
 def add_shortcut():
-    frontpage.add_shortcut('minetest', title, '?selected=minetest',
-                           'glyphicon-th-large', description)
+    frontpage.add_shortcut('minetest', title, None, 'glyphicon-th-large',
+                           description)
 
 
 def enable():

plinth/modules/mumble/__init__.py

@@ -79,8 +79,8 @@ def setup(helper, old_version=None):
 
 
 def add_shortcut():
-    frontpage.add_shortcut('mumble', title, '?selected=mumble',
-                           'glyphicon-headphones', description)
+    frontpage.add_shortcut('mumble', title, None, 'glyphicon-headphones',
+                           description)
 
 
 def enable():

plinth/modules/privoxy/__init__.py

@@ -83,8 +83,8 @@ def setup(helper, old_version=None):
 
 
 def add_shortcut():
-    frontpage.add_shortcut('privoxy', title, '?selected=privoxy',
-                           'glyphicon-cloud-upload', description)
+    frontpage.add_shortcut('privoxy', title, None, 'glyphicon-cloud-upload',
+                           description)
 
 
 def enable():

plinth/modules/quassel/__init__.py

@@ -87,8 +87,8 @@ def setup(helper, old_version=None):
 
 
 def add_shortcut():
-    frontpage.add_shortcut('quassel', title, '?selected=quassel',
-                           'glyphicon-retweet', description)
+    frontpage.add_shortcut('quassel', title, None, 'glyphicon-retweet',
+                           description)
 
 
 def enable():

plinth/modules/radicale/__init__.py

@@ -77,8 +77,8 @@ def setup(helper, old_version=None):
 
 
 def add_shortcut():
-    frontpage.add_shortcut('radicale', title, '?selected=radicale',
-                           'glyphicon-calendar', description)
+    frontpage.add_shortcut('radicale', title, None, 'glyphicon-calendar',
+                           description)
 
 
 def enable():

plinth/modules/repro/__init__.py

@@ -91,8 +91,8 @@ def setup(helper, old_version=None):
 
 
 def add_shortcut():
-    frontpage.add_shortcut('repro', title, '?selected=repro',
-                           'glyphicon-phone-alt', description)
+    frontpage.add_shortcut('repro', title, None, 'glyphicon-phone-alt',
+                           description)
 
 
 def enable():

plinth/modules/xmpp/__init__.py

@@ -93,8 +93,8 @@ def setup(helper, old_version=None):
 def add_shortcut():
     frontpage.add_shortcut('jwchat', _('Chat Client (JWChat)'), '/jwchat',
                            'glyphicon-comment')
-    frontpage.add_shortcut('xmpp', title, '?selected=xmpp',
-                           'glyphicon-comment', description)
+    frontpage.add_shortcut('xmpp', title, None, 'glyphicon-comment',
+                           description)
 
 
 class EjabberdServiceView(ServiceView):