Followup to https://codeberg.org/forgejo/forgejo/pulls/7481.
Fix a bug reported by @Gusted where the switch would jump ~1px up when switched to preview mode.
It was because the switch is always center-aligning to the largest element in the toolbar. With toolbar buttons disappearing, the largest element was the switch itself. By placing it in a box with same height as the buttons we can ensure it can always stay in the same position.
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7492
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: 0ko <0ko@noreply.codeberg.org>
Co-committed-by: 0ko <0ko@noreply.codeberg.org>