Updated the popover box

[mayank190801]

Fixes issue #360

-- Detailed changes --

• Remove the end button from the bottom, and used only the cross-icon portion of it in the title.
• Written some extra divs and classes for adjusting title and icon in the same line.
• Written some extra css for styling the title div.
• Removed the dash between the prev and next by changing the color to white.
• Centered prev and next text by reducing some upper space.
• Reduced some space between button and contents.
• Increased the max-width from 276px to 300px of the box.

Before

After

[llaske]

It's not the right way to solve the problem. See my comment on your issue..