TF-2972 Turn color of Clean button into primary to have consistent color in app

lib/features/mailbox/presentation/styles/empty_mailbox_dialog_overlay_styles.dart

@@ -19,7 +19,7 @@ class EmptyMailboxDialogOverlayStyles {
   static const Color backgroundColor = Colors.white;
   static const Color closeButtonColor = AppColor.colorClosePopupDialogButton;
   static const Color cancelButtonColor = AppColor.colorCancelPopupDialogButton;
-  static const Color emptyButtonColor = AppColor.colorEmptyPopupDialogButton;
+  static const Color emptyButtonColor = AppColor.primaryColor;
   static const Color emptyButtonBackground = Colors.transparent;
   static Color get shadowColor => Colors.grey.shade500;
 
@@ -38,9 +38,9 @@ class EmptyMailboxDialogOverlayStyles {
     fontWeight: FontWeight.w400,
     color: Colors.black
   );
-  static const TextStyle emptyButtonTextStyle = TextStyle(
+  static const TextStyle cleanButtonTextStyle = TextStyle(
     fontWeight: FontWeight.w400,
-    fontSize: 15,
-    color: AppColor.colorTextBody
+    fontSize: 13,
+    color: Colors.white
   );
 }

lib/features/mailbox/presentation/widgets/empty_mailbox_dialog_overlay.dart

@@ -89,7 +89,7 @@ class EmptyMailboxDialogOverlay extends StatelessWidget {
                     text: AppLocalizations.of(context).clean,
                     backgroundColor: EmptyMailboxDialogOverlayStyles.emptyButtonColor,
                     padding: EmptyMailboxDialogOverlayStyles.buttonPadding,
-                    textStyle: EmptyMailboxDialogOverlayStyles.buttonTextStyle,
+                    textStyle: EmptyMailboxDialogOverlayStyles.cleanButtonTextStyle,
                     borderRadius: EmptyMailboxDialogOverlayStyles.buttonRadius,
                     onTapActionCallback: () => onEmptyMailboxActionCallback.call(mailboxNode),
                   )