fix: set xml node background to white

[JayaKrishnaNamburu]

Description

fixes #5015
Added backgroundColor to white for XMLNode so the content is visible even when the GlobalRoot is set to something else.

Steps for reproduction

• Create a demo project.
• Create a XML with sitemap.xml
• Now, switch back to the home page and set the backgroudnColor of the global root to some random colour.
• Then, switch back to the sitemap page. Now, the contents are not visible as the background is inherited from the GlobalRoot. This fix will help in setting to white whenever a xml node is used.

Code Review

• hi @kof, I need you to do
  • test it on preview

Before requesting a review

• made a self-review

Before merging

• tested locally and on preview environment (preview dev login: 0000)

[TrySound]

Thanks!