ui.hawt.io - Add pages for undocumented widgets

[gashcrumb]

There's a few widgets that aren't currently documented at all, think this is all of 'em:

• dragDrop.ts
• fileDrop.ts
• filter.ts
• gridster.ts
• groupBy.ts
• list.ts
• object.ts
• pane.ts
• row.ts
• toc.ts
• windowHeight.ts
• tablePager.ts
• tagList.ts I think?

Be good to either get pages for 'em or evaluate if they're still used and maybe zap 'em if not.

[gashcrumb]

Got tablePager.ts

[abkieling]

All widgets being maintained have documentation.