SIO-2331 Improve all submissions view

Change-Id: If17643597ff5251497309714589729b172fc1398

oioioi/base/static/js/admin-filter-collapse.js

@@ -0,0 +1,33 @@
+(function($) {
+    'use strict';
+    class FilterCollapse {
+        constructor(filterElement) {
+            this.init(filterElement);
+            this.bindHover();
+            this.bindToggle();
+        }
+
+        init(filterElement) {
+            this.$filterElement = $(filterElement);
+            this.$filterList = this.$filterElement.next('ul').hide();
+        }
+
+        bindToggle() {
+            let that = this;
+            this.$filterElement.click(function(){
+                that.$filterList.slideToggle();
+            });
+        }
+
+        bindHover() {
+            this.$filterElement.css('cursor', 'pointer');
+        }
+    }
+
+    $(document).ready(function() {
+        $('#changelist-filter').children('h3').each(function() {
+            // Initialization binds on click function to elements
+            new FilterCollapse(this);
+        });
+    });
+})(django.jQuery);

oioioi/contests/admin.py

@@ -425,7 +425,7 @@ def lookups(self, request, model_admin):
                     .filter(contest=request.contest)
                     .values_list('problem__name', flat=True)))
 
-        return [(x, x) for x in p_names]
+        return sorted([(x, x) for x in p_names], key=lambda (s, _): s.lower())
 
     def queryset(self, request, queryset):
         if self.value():
@@ -502,7 +502,14 @@ def queryset(self, request, queryset):
 class SubmissionAdmin(admin.ModelAdmin):
     date_hierarchy = 'date'
     actions = ['rejudge_action']
-    search_fields = ['user__username', 'user__last_name']
+    search_fields = ['user__username', 'user__last_name',
+                     'problem_instance__problem__name', 'problem_instance__short_name']
+
+    class Media:
+        js = (
+            'admin/js/jquery.init.js',
+            'js/admin-filter-collapse.js'
+        )
 
     # We're using functions instead of lists because we want to
     # have different columns and filters depending on whether