Brief summary of the bug. What is it ? Where is it ?

Add a long variable name as a dashboard filter, and you will see if overflowing of its container, as shown in the attached screenshot.

Steps to reproduce:

• Create a dashboard and add a report to it
• Add a variable filter with a long variable name to the dashboard

Actual result:

The variable name is overflowing outside the variable filter boundaries, as shown in the screenshot.

Expected result:

The variable filter is truncated with ellipses and a tooltip appear with the full name when hovering over the name.