(core) Adding font options to the style picker

Summary:
Redesigning color picker:
- Single color palette (no light/dark switch)
- Ability to remove color (new empty button)

New font options in the color picker.
Font options are available on:
- Default cell style
- Conditional rules styles
- Choice/ChoiceList editor and token field
- Filters for Choice/ChoiceList columns

Design document:
https://www.figma.com/file/bRTsb47VIOVBfJPj0qF3C9/Grist-Updates?node-id=415%3A8135

Test Plan: new and updated tests

Reviewers: georgegevoian, alexmojaki

Reviewed By: georgegevoian, alexmojaki

Subscribers: alexmojaki

Differential Revision: https://phab.getgrist.com/D3335

app/client/ui/ColumnFilterMenu.ts

@@ -378,6 +378,10 @@ function getRenderFunc(columnType: string, fieldOrColumn: ViewFieldRec|ColumnRec
         {
           fillColor: choiceOptions[value.label]?.fillColor,
           textColor: choiceOptions[value.label]?.textColor,
+          fontBold: choiceOptions[value.label]?.fontBold ?? false,
+          fontUnderline: choiceOptions[value.label]?.fontUnderline ?? false,
+          fontItalic: choiceOptions[value.label]?.fontItalic ?? false,
+          fontStrikethrough: choiceOptions[value.label]?.fontStrikethrough ?? false,
         },
         dom.cls(cssToken.className),
         cssInvalidToken.cls('-invalid', !choiceSet.has(value.label)),