The application does not delimitate correctly the "Controls bar" and "Whiteboard canvas"

REPRODUCIBILITY LEVEL:
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Always

STEPS:
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1. Navigate to the Liferay Whiteboard.
2. Move shapes to the left site (under the Whiteboard controls).
3. Check the "Opacity" option alignment.

CURRENT RESULT:
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A) After step 2: The application doesn't allow to identify where the Whiteboard finish and where the edition controls bar start.
B) After step 3: The application displays an "Opacity" option that exceeds the expected edition controls bar.

EXPECTED RESULT:
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- The application should have a visual indication to distinguish where the "Controls bar" and the "Whiteboard" start at the left side.
- The "Opacity" dropdown should be displayed under the it's respective label.