Removed a duplicated string.
impldemented big/small receiver cards selection.
Merge branch 'devel' of github.com:globaleaks/GLClient into devel

Conflicts:
	app/l10n/ar.json
	app/l10n/bg.json
	app/l10n/cs.json
	app/l10n/en.json
	app/l10n/es.json
	app/l10n/fr.json
	app/l10n/hu_HU.json
	app/l10n/it.json
	app/l10n/nl.json
	app/l10n/pt_BR.json
	app/l10n/ru.json
	app/l10n/sr_RS.json
	app/l10n/sr_RS@latin.json
	app/l10n/vi.json