Redesign task list view

assets/sass/app.sass

@@ -33,11 +33,12 @@
 @import board
 @import task_board
 @import task_board_saving_state
-@import task_board_category
 @import task_board_avatar
-@import task_board_icons
-@import task_board_age
-@import task_board_date
+@import task_icons
+@import task_icon_age
+@import task_category
+@import task_date
+@import task_list
 @import task_tags
 @import task_summary
 @import task_form