Move "https://" addrepo default into a string

res/layout/addrepo.xml

@@ -16,7 +16,7 @@
         android:layout_height="wrap_content"
         android:inputType="textUri"
         android:maxLines="2"
-        android:text="https://" />
+        android:text="@string/https" />
 
     <TextView
         android:layout_width="match_parent"

res/values/no_trans.xml

@@ -12,6 +12,8 @@
 	<string name="menu_dogecoin">Dogecoin</string>
 	<string name="menu_flattr">Flattr</string>
 
+	<string name="https">https://</string>
+
 	<string-array name="updateIntervalValues">
 		<item>0</item>
 		<item>1</item>