Tooltips are cut off in DEMO

Issue type

I'm submitting a

• [x ] bug report
• feature request
• question about the decisions made in the repository

Issue description

Current behavior:

I can see tooltips are cut off when nbTooltipPlacement is set to 'left' or 'right' in the live demo. Expected behavior:

"Th" in "This is a tooltip" should be visible with the pointed arrow. Steps to reproduce:

can be seen in the live demo, link is below. https://www.akveo.com/ngx-admin/pages/modal-overlays/tooltip Related code:

        <nb-actions size="medium">
          <nb-action icon="save-outline" status="primary" 
          [class.btn-pulse]="submitted" nbTooltip="Click to create a new 'Company Type'." nbTooltipPlacement="right"></nb-action>
      </nb-actions>

Other information:

npm, node, OS, Browser

<!--
Node, npm: `node --12.13.1` and `npm --6.12.1`
OS: Windows10
Browser: Chrome/Firefox
-->

Angular, Nebular

<!--
4.4.0
-->