fix: Fixes widget unread view blocking parent page (#3658)

Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/sdk/IFrameHelper.js

@@ -169,7 +169,6 @@ export const IFrameHelper = {
     },
     updateIframeHeight: message => {
       const { extraHeight = 0, isFixedHeight } = message;
-      if (!extraHeight) return;
 
       IFrameHelper.setFrameHeightToFitContent(extraHeight, isFixedHeight);
     },