[Translate] `model_scale_selector`

[mmaelicke]

The model scale selector translations can be found here:

RUINSapp/ruins/components/model_scale_select.py

Line 31 in e04331e

_TRANSATE_DE = dict(

There are also some inline translations:

RUINSapp/ruins/components/model_scale_select.py

Line 68 in e04331e

'Climate model' if config.lang == 'en' else 'Klimamodell',

RUINSapp/ruins/components/model_scale_select.py

Line 85 in e04331e

use_global = right.button('USE GLOBAL MODELS' if config.lang == 'en' else 'GLOBALES MODELL')

RUINSapp/ruins/components/model_scale_select.py

Line 88 in e04331e

use_regional = left.button('USE REGIONAL MODELS' if config.lang == 'en' else 'REGIONALES MODELL')

@cojacoo, @jonaslenz