grey out Calculate button if basins structure is invalid
use Mermaid Nodes for walls
suffix multiple walls on same basins pair
base Mermaid Nodes on children UIDs
display Mermaid code (debug)
unselect element after deletion
highlight selected element

add basin
remove basin (buggy)
remove wall

add option "messageWhenEmpty" in SelectField

Resolve "Ajout de la fonctionnalité "Respect des critères""

See merge request !82

Merge branch '223-ameliorer-le-systeme-de-traduction' into '60-ajout-de-la-fonctionnalite-respect-des-criteres'

Resolve "Améliorer le système de traduction"

See merge request !105

Merge branch '428-moteur-de-recherche-sur-la-page-d-accueil' into '60-ajout-de-la-fonctionnalite-respect-des-criteres'

Resolve "Moteur de recherche sur la page d'accueil"

See merge request !103

+ Corrections in English documentation

Refs #428

toggle search field by clicking a search icon in the nav bar
use flex for search field

multiple terms search: all terms must match
added empty descriptions in language files for each module