improve Layout

[ModischFabrications]

horizontal alignment difficult, no idea

[ModischFabrications]

set width of input buttons column by setting a size for the header cell. See included TODO

[ModischFabrications]

• [x] increase text size of table headers
• [x] make desktop mode use bigger graphics and full width

[ModischFabrications]

use placeholder instead of collapse to make side by side better weighted?

[ModischFabrications]

overlay to signal invalid state? https://bootstrap-vue.js.org/docs/components/overlay

busy state of table would be nice, but is not implemented for lists: https://bootstrap-vue.js.org/docs/components/table#table-busy-state

[ModischFabrications]

• [ ] align buttons to center (seem to be slightly above the centerline)

[ModischFabrications]

improved in e3eb20b