Fix edit Asset Device - slots field required
moved sn validation to validators & added max_length=200 check on single sn
skipping empty sn & fixed test message
MultilineField used on sn in add part|device
rewritten sn, barcode, imei in 'add device|part' form to new MultilineField
Merge branch 'develop' of https://github.com/allegro/ralph_assets into unlimited-multi
better docstring in validate_snbcs
Migrate from int to float and changes in api

- Migrate from int to float height_of_device
- Change get_asset api
Update change log and upgrade versuin

- Update changelog
- Upgrade version
working refactored 'edit device' view (dirty version)
code cleanups & updated tests
Merge branch 'develop' into device-info-bo
indention fixes & better block name for tables
fixes after review
added fillables for each bulkedit field beside: sn, barcode, imei
fixed indentions
First wrong version
A column succesfully displays in a grid
Licence List stub
The grid for licences