Optimization of the left column designs

[jpbraun]

Since V 1.0 there is wasted space in den left column

[stefan-niedermann]

I absolutely agree with you in this point, but i think this issue would better fit in the repository of the vue components: https://github.com/nextcloud/nextcloud-vue/issues/new

I also dislike this design in the Notes app which looks quiet similar here.

[juliushaertl]

Good suggestion I'd say at least for the main board list. The others like archived and shared can stay nested and collapsed.

[stefan-niedermann]

I didn't mean to pull the boards a level up in the hierarchy, but to vertically align the icons of the lower hierarchy level with the text of the main items:

[jancborchardt]

Something that is part of the mockup at #2807 is a simplification of the board list. Instead of being an unnecessarily complex tree view, it would be a simple flat list.