Fix map buttons display logic and styles

[Sonje]

Changes:

• instead of playing with z-indices, I decided to just not show buttons behind the session details (unnecessary element)
• I changed the map buttons styling so it will always fit the screen size on mobile devices, unfortunately our 100% goes outside device view, so I decided to manually adjust paddings, and the right side placement. I know it's not nice, but fixing the width will be harder.

[Sonje]

mobile devices: horizontally center the buttons on the bottom of the screen i.e. "Filters", "Timelapse", "Legend", "Sessions"

[Sonje]

mobile devices > mobile sessions: map buttons visible on the modal