Drag Pop-up window

[dhakelila]

Issue addressed.

Taking care of a little bug that avoids the user to see the full content of the tooltip when it overfolows the high of the screen.

Vizz team: https://vizzuality.atlassian.net/browse/GMW-884

[lyubovpencheva]

Ready for review in both environments.

[klongleywood]

@lyubovpencheva I think this is fixed though I admit to not being able to visualize what the original bug was. @lhilarides can you have a look?

[lhilarides]

Works now