Allow relative units in height

[mariomui]

When not using px the number will automatically be px When using a vh vmin or any uom, banner will automatically use uom. The goal is to allow people who detach views to new windows to savely use banners.

Also, included prettierrc to mimic your style but make the formatting consistent. Just so there are no arguments over styling.

Implications: i tested on chrome responsiveness. I have not tested on Android or PC.

[noatpad]

(Closing PR due to rewrite) But also I took the opportunity to implement relative units to be taken for banner height settings during the rewrite, so thank you for laying out the groundwork!