feat: Collection Icons (#1281)

* wip: Working for creation, and display

* feat: IconPicker

* fix

* feat: Invert collection icon color when dark in dark mode

* Improve readability of dropdown menus in dark mode
Suggest icon based on collection name

* Add additional icons
Tweaks and final polish

* fix: Write default icon as empty icon column

* feat: Improve icon selection logic
add more keywords
Improve icon coloring when selected and in dark mode

* lint

* lint

shared/styles/theme.js

@@ -155,6 +155,7 @@ export const dark = {
   sidebarText: colors.slate,
   shadow: 'rgba(0, 0, 0, 0.6)',
 
+  menuBorder: lighten(0.1, colors.almostBlack),
   menuBackground: lighten(0.015, colors.almostBlack),
   menuShadow:
     '0 0 0 1px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.08), inset 0 0 1px rgba(255,255,255,.2)',