fix: height in grid

[ildar170975]

Before:

  - type: grid
    columns: 2
    square: false
    title: not square
    cards:
      - &ref_graph_card
        type: custom:mini-graph-card
        entities:
          - entity: sensor.xiaomi_cg_1_co2
      - &ref_entity_card
        type: entity
        entity: sun.sun
      - *ref_entity_card
      - *ref_graph_card

  - type: grid
    columns: 2
    square: true
    title: square
    cards:
      - *ref_graph_card
      - *ref_entity_card
      - *ref_entity_card
      - *ref_graph_card

After:

Probably may be useful in case of using a new experimental "sections" views (honestly, do not care about this still beta feature).

[akloeckner]

Should we then merge this after #1139 ?

(honestly, do not care about this still beta feature)

What do you mean by this? Are sections still beta?

[ildar170975]

Are sections still beta?

Yes, still experimental... But many beginners use it and some of them seems like unaware about the old-style working way...

[ildar170975]

Should we then merge this after #1139 ?

Recently got home, have not seen this PR yet.

[ildar170975]

Based on my estimation of users using sections: I would say that my PR may come first )))))