Revert "Parse optional named filters from filter url"

This reverts commit c424c3fe.

flask_admin/model/base.py

@@ -958,34 +958,27 @@ class BaseModelView(BaseView, ActionsMixin):
         sort_desc = request.args.get('desc', None, type=int)
         search = request.args.get('search', None)
 
-        filter_idx_by_label = dict((flt.query_label(), i) for i, flt in enumerate(self._filters))
         # Gather filters
         if self._filters:
             sfilters = []
 
             for n in request.args:
-                if not n.startswith('flt'):
+                if n.startswith('flt'):
+                    ofs = n.find('_')
+                    if ofs == -1:
                         continue
 
-                pos, filter_label = n[3:].split('_', 1)
-                
-                # If pos not specified, just add incrementally to the list.
-                pos = int(pos) if pos else len(sfilters)
-
                     try:
-                    # See if filter is numeric
-                    idx = int(filter_label)
+                        pos = int(n[3:ofs])
+                        idx = int(n[ofs + 1:])
                     except ValueError:
-                    # If non-numeric, look filter up by name
-                    try:
-                        idx = filter_idx_by_label[filter_label]
-                    except KeyError:
-                        # No matching filter name
                         continue
 
-                if 0 <= idx < len(self._filters):
+                    if idx >= 0 and idx < len(self._filters):
                         flt = self._filters[idx]
+
                         value = request.args[n]
+
                         if flt.validate(value):
                             sfilters.append((pos, (idx, flt.clean(value))))