More config fixes

qutebrowser/config/configdata.yml

@@ -364,9 +364,9 @@ window.hide_wayland_decoration:
 keyhint.blacklist:
   type:
     name: List
+    none_ok: true
     valtype:
       name: String
-      none_ok: true
   default: null
   desc: >-
     Keychains that shouldn\'t be shown in the keyhint dialog.
@@ -1526,7 +1526,7 @@ colors.downloads.start.bg:
   desc: Color gradient start for download backgrounds.
 
 colors.downloads.stop.fg:
-  default: '#0000aa'
+  default: white
   type: QtColor
   desc: Color gradient end for download text.
 

qutebrowser/utils/urlutils.py

@@ -99,10 +99,8 @@ def _get_search_url(txt):
     engine, term = _parse_search_term(txt)
     assert term
     if engine is None:
-        # FIXME:conf
-        template = config.val.searchengines.DEFAULT
-    else:
-        template = config.get('searchengines', engine)
+        engine = 'DEFAULT'
+    template = config.val.searchengines[engine]
     url = qurl_from_user_input(template.format(urllib.parse.quote(term)))
     qtutils.ensure_valid(url)
     return url