ui: problem_edit tools

packages/ui-default/pages/problem_main.page.styl

@@ -1,8 +1,14 @@
 .page--problem_main
 .page--problem_category
 .page--problem_settings
+  .col--checkbox
+    width: rem(60px)
+
+  .col--pid
+    width: rem(80px)
+  
   .col--status
-    width: rem(150px)
+    width: rem(140px)
     position: relative
 
   .col--submit_n, .col--ac_rate, .col--difficulty
@@ -97,3 +103,10 @@
       margin-left: 0
       margin-right: 0
       margin-top: rem(floor($menu-drop-triangle-size * -1.414))
+
+
+.display-mode .display-mode-hide
+  display: none
+
+.edit-mode .edit-mode-hide
+  display: none