Enable opportunity card deletion (#490)

* Add checkbox

* Add state management for selected opportunities

* Use recoil for selected items state, show action bar

* Deduplicate code

* Add delete action

* Enable delete

* Add color for selected cards

* update board state on delete

* Add stories

* Enable empty board

* Fix story

* Handle dark mdoe

* Nits

* Rename module

* Better naming

* Fix naming confusion process<>progress

front/src/modules/ui/themes/themes.ts

@@ -29,6 +29,8 @@ export const lightTheme = {
     background: backgroundLight,
     border: borderLight,
     boxShadow: boxShadowLight,
+    selectedCardHover: color.blue20,
+    selectedCard: color.blue10,
     font: fontLight,
   },
 };
@@ -40,6 +42,8 @@ export const darkTheme: ThemeType = {
     background: backgroundDark,
     border: borderDark,
     boxShadow: boxShadowDark,
+    selectedCardHover: color.blue70,
+    selectedCard: color.blue80,
     font: fontDark,
   },
 };