UI-3178: Replace hard-coded string by i18n reference (#85)

* Use i18n reference instead of hard-coded strings

* Add German translation for new string

i18n/de-DE.json

@@ -571,6 +571,7 @@
 		"uploadPicture": "Ein Bild hochladen",
 		"user": "Benutzer",
 		"call_forward": {
+			"failoverMode": "Im Fehlerfall",
 			"directCallsOnly": "Nur Direktanrufe weiterleiten",
 			"headline": "Einstellungen zur Weiterleitung von Benutzeranrufen",
 			"keepCallerId": "Ursprüngliche Anrufer-ID speichern",

i18n/en-US.json

@@ -579,6 +579,7 @@
 		"uploadPicture": "Upload a Picture",
 		"user": "User",
 		"call_forward": {
+			"failoverMode": "Failover Mode",
 			"directCallsOnly": "Forward direct calls only",
 			"headline": "User Call Forwarding Settings",
 			"keepCallerId": "Keep Original Caller-ID",

submodules/users/views/feature-call_forward.html

@@ -6,9 +6,15 @@
 		{{ i18n.users.call_forward.headline }}
 
 		<div class="btn-group feature-select-mode">
-			<button data-value="off" class="monster-button monster-button-fit{{#compare extra.callForwardMode "===" "off"}} monster-button-primary selected{{/compare}}">Off</button>
-			<button data-value="failover" class="monster-button monster-button-fit{{#compare extra.callForwardMode "===" "failover"}} monster-button-primary selected{{/compare}}">Failover Mode</button>
-			<button data-value="on" class="monster-button monster-button-fit{{#compare extra.callForwardMode "===" "on"}} monster-button-primary selected{{/compare}}">On</button>
+			<button data-value="off" class="monster-button monster-button-fit{{#compare extra.callForwardMode "===" "off"}} monster-button-primary selected{{/compare}}">
+				{{i18n.off}}
+			</button>
+			<button data-value="failover" class="monster-button monster-button-fit{{#compare extra.callForwardMode "===" "failover"}} monster-button-primary selected{{/compare}}">
+				{{i18n.users.call_forward.failoverMode}}
+			</button>
+			<button data-value="on" class="monster-button monster-button-fit{{#compare extra.callForwardMode "===" "on"}} monster-button-primary selected{{/compare}}">
+				{{i18n.on}}
+			</button>
 		</div>
 	</div>