fix for text field focus colors

AndroidManifest.xml

@@ -133,7 +133,7 @@
         <activity
             android:name=".authentication.AuthenticatorActivity"
             android:exported="true"
-            android:theme="@style/Theme.ownCloud.noActionBar"
+            android:theme="@style/Theme.ownCloud.noActionBar.Login"
             android:launchMode="singleTask">
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />

res/values/styles.xml

@@ -40,6 +40,10 @@
 		<item name="android:alertDialogTheme">@style/Theme.ownCloud.Dialog</item>
     </style>
 
+	<style name="Theme.ownCloud.noActionBar.Login" parent="Theme.ownCloud.noActionBar">
+		<item name="colorAccent">@color/white</item>
+	</style>
+
 	<style name="ownCloud.Button" parent="Widget.AppCompat.Button">
 		<item name="colorButtonNormal">@color/primary</item>
 	</style>