Move alert dialog to material variant and setting the correct accent color for the button texts via styles

res/values/styles.xml

@@ -62,7 +62,9 @@
 	</style>
 
 	<!-- Dialogs -->
-	<style name="Theme.ownCloud.Dialog" parent="@android:style/Theme.Dialog">
+	<style name="Theme.ownCloud.Dialog" parent="style/Theme.AppCompat.Light.Dialog.Alert">
+		<item name="windowNoTitle">false</item>
+		<item name="colorAccent">@color/owncloud_blue_accent</item>
 	</style>
 	
 	<!-- PopDownMenu -->
@@ -125,8 +127,9 @@
   		    
     </style>
 	
-	<style name="OAuthDialog" parent="@android:style/Theme.Dialog">
-		<item name="android:windowNoTitle">false</item>	
+	<style name="OAuthDialog" parent="style/Theme.AppCompat.Light.Dialog.Alert">
+		<item name="windowNoTitle">false</item>
+		<item name="colorAccent">@color/owncloud_blue_accent</item>
 	</style>    
 		
 	<color name="setup_text_hint">#777777</color>

src/com/owncloud/android/ui/dialog/ConfirmationDialogFragment.java

@@ -20,12 +20,13 @@
 
 package com.owncloud.android.ui.dialog;
 
-import android.app.AlertDialog;
+import android.support.v7.app.AlertDialog;
 import android.app.Dialog;
 import android.content.DialogInterface;
 import android.os.Bundle;
 import android.support.v4.app.DialogFragment;
 
+import com.owncloud.android.R;
 import com.owncloud.android.lib.common.utils.Log_OC;
 
 
@@ -81,7 +82,7 @@ public class ConfirmationDialogFragment extends DialogFragment {
             return null;
         }
 
-        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
+        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(), R.style.Theme_ownCloud_Dialog)
             .setIcon(android.R.drawable.ic_dialog_alert)
             .setMessage(String.format(getString(resourceId), confirmationTarget))
             .setTitle(android.R.string.dialog_alert_title);