[Embed] Error Message cropped in full screen dialog

## Bug Report

**Current Behavior**
In Embed component dialog, error message is getting cropped when the dialog is in full-screen mode.

**Expected behavior/code**
Error message should be clearly displayed and readable

**Environment**
- AEM 6.5 SP2
- Core Components version 2.7.0
- JRE version - JDK11

**Possible Solution**

**Additional context / Screenshots**

Start by reproducing the error in the Embed component dialog while it is in full-screen mode, using the reported AEM 6.5 SP2 environment if available. Inspect the dialog's rendering and styling to identify why the error message is cropped; done means the full error message is clearly displayed and readable.

Written by the indexing model from the issue text.