ui.footer(fixed=False) does not work

[falkoschindler]

Description

Consider this example:

with ui.footer(fixed=False):
    ui.label('FOOTER: Should not be fixed.')

ui.image('https://picsum.photos/id/377/640/360')

The footer is fixed to the page although it shouldn't be.

I think this is because only one character of Quasar's weird layout code is set to "F", but the corners remain "f":

nicegui/nicegui/page_layout.py

Line 202 in 6950a66

code[9] = 'F' if fixed else 'f'

[falkoschindler]

Ok, as can be seen at https://quasar.dev/layout-builder, the corners should be encoded with lowercase letters. Fixing the initial layout code in b223719 the bug seems to be resolved.