[v5] Language selector still visible for single language app

[afbora]

When single language environment:

• Language selector visible (was not visible for 4.x)
• Also visible unnecessary separate line under default language (ignore this if we remove the selector entirely for single language)

[tobimori]

man you were 55 minutes faster than me :(

[distantnative]

@afbora Does it work when you change https://github.com/getkirby/kirby/blob/v5/develop/src/Panel/Ui/Buttons/LanguagesDropdown.php#L114 to

		if ($this->kirby->languages()->count() < 2) {

[afbora]

@distantnative Yes, it works.