Define order of widgets to list

So far they were listed random (as dictionary does not have any defined
order), so let's list them in a prefered way.

Fixes #467
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/trans/views/widgets.py

@@ -41,6 +41,13 @@ def widgets_root(request):
     )
 
 
+def widgets_sorter(widget):
+    """
+    Provides better ordering of widgets.
+    """
+    return WIDGETS[widget].order
+
+
 def widgets(request, project):
     obj = get_project(request, project)
 
@@ -63,7 +70,7 @@ def widgets(request, project):
         reverse('widgets', kwargs={'project': obj.slug})
     )
     widget_list = []
-    for widget_name in WIDGETS:
+    for widget_name in sorted(WIDGETS, key=widgets_sorter):
         widget_class = WIDGETS[widget_name]
         color_list = []
         for color in widget_class.colors:

weblate/trans/widgets.py

@@ -71,6 +71,7 @@ class Widget(object):
     alpha = False
     extension = 'png'
     content_type = 'image/png'
+    order = 100
 
     def __init__(self, obj, color=None, lang=None):
         '''
@@ -252,6 +253,7 @@ class NormalWidget(Widget):
         'width': 180,
         'horizontal': True,
     }
+    order = 110
 
     def render_texts(self):
         self.render_text(
@@ -277,6 +279,7 @@ register_widget(NormalWidget)
 
 class SmallWidget(Widget):
     name = '88x31'
+    order = 120
 
     def render_texts(self):
         self.render_text(
@@ -300,6 +303,7 @@ class BadgeWidget(Widget):
     name = 'status'
     colors = ('badge', )
     alpha = True
+    order = 90
 
     def get_filename(self):
         if self.percent > 90:
@@ -336,6 +340,7 @@ class ShieldsBadgeWidget(Widget):
     colors = ('badge', )
     extension = 'svg'
     content_type = 'image/svg+xml'
+    order = 80
 
     def redirect(self):
         if ENABLE_HTTPS: