unify strings in untranslated.xml and english base lang

deltachat-ios/Controller/ConnectivityViewController.swift

@@ -123,7 +123,7 @@ class ConnectivityViewController: WebViewViewController {
         if ProcessInfo.processInfo.isLowPowerModeEnabled {
             return "<span class=\"disabled dot\"></span>"
                 .appending(title)
-                .appending(String.localized("connectivity_low_battery_mode"))
+                .appending(String.localized("connectivity_low_power_mode"))
         }
 
         let timestamps = UserDefaults.standard.array(forKey: Constants.Keys.notificationTimestamps) as? [Double]

deltachat-ios/en.lproj/Localizable.strings

@@ -896,5 +896,5 @@
 "webxdc_empty_hint" = "Received or sent apps will appear here. Tap \"Files\" to select downloaded apps.";
 "shortcut_share_btn" = "Click the share button";
 "shortcut_add_to_home_description" = "Select - Add to Home Screen - to add the app to your home screen.";
-"connectivity_low_data_mode" = "Disabled by system's \"Low Data Mode\"";
-"connectivity_low_battery_mode" = "Low Power Mode: background message fetching is disabled.";
+"connectivity_low_data_mode" = "Disabled by system's \"Low Data Mode\".";
+"connectivity_low_power_mode" = "Disabled by system's \"Low Power Mode\".";

scripts/untranslated.xml

@@ -6,6 +6,6 @@
     <string name ="webxdc_empty_hint">Received or sent apps will appear here. Tap \"Files\" to select downloaded apps.</string>
     <string name ="shortcut_share_btn">Click the share button</string>
     <string name ="shortcut_add_to_home_description">Select - Add to Home Screen - to add the app to your home screen.</string>
-    <string name="connectivity_low_data_mode">Low Data Mode: background message fetching is disabled.</string>
-    <string name="connectivity_low_power_mode">Disabled by system's \"Low Power Mode\"".</string>
+    <string name="connectivity_low_data_mode">Disabled by system's \"Low Data Mode\".</string>
+    <string name="connectivity_low_power_mode">Disabled by system's \"Low Power Mode\".</string>
 </resources>