Clicking on Eye symbol moves to the top of the page

[iuliabalan]

To reproduce:
*Click on the eye icon in any of the Evolution fields.

Expected behaviour:

• The "detailed diagram" pop-up opens.
• After closing the pop-up, the user should remain at the same position on the page.

Actual behaviour:

• When closing the pop-up, the user is moved back to the top of the page and loses their previous position.

[Farcasut]

Removed the href="#" and added the btn class.