request: pallete should haev tabs

[eradin]

The field pallete has those left and right arrows. A better approach would be tabs. To a new user, it's not apparent that the other pages are there. Tabs would make it obvious.

If you like the current implementation, perhaps make it configurable.

[kevinchappell]

This is configurable now. Set displayType on the controls panels to show the groups as tabs:

new FormeoEditor({
  editorContainer: '#formeo-editor',
  controls: { panels: { displayType: 'tabbed' } },
})

'auto' uses tabs when the panel is wider than 390px and the arrows when it's narrower. The default is still 'slider'. The option is missing from the controls docs, so I'll add it there.

[kevinchappell]

implemented in #514