Harshment,
Like I already suggested the change should be SAP NOT on Portal.
In order to make the buttons/texts/images not to display in portal VIM consultant need to go the particular dashboard/screen configuration & change the setting to "SAP GUI only"
This would NOT display the image/button/text in the portal but still displays them in VIM dashboard.
You can request your VIM consultant to make these changes.
Let me know if it doesn't fix.
Thanks,
Kolusu