Adding a separator between rows

[michalowskil]

An "Add separator" button could be added next to the "Add row" button. When collapsed in the editor, it would look and behave like a row and have the same buttons, except that in the preview it would say "separator". When expanded, options related only to the separator would appear - for example, one option would be "hide separator when sorting is enabled."

[michalowskil]

I've prepared a preliminary version that looks like the images below. Any number of separators can be added. Each separator divides the rows into groups. In the example below, we have two groups. When sorting is not set, the groups have no effect, but when sorting is enabled, it occurs separately for each group. In the example below, we have two groups sorted in ascending order by temperature. The separator affects sorting even when its thickness is set to zero (it's invisible).

[michalowskil]

https://github.com/michalowskil/flex-cells-card/releases/tag/v0.13.0-beta.1

• v0.13.0-beta (Pre-release) —
  • Added separators and sorting by groups.

[michalowskil]

• v0.13.0 —
  • Added separators and sorting by groups.
  • Added dynamic rules for the entire row.