The delay is used to check whether a selection is still available after
PointerUp, as this is often deleted in Firefox under Windows mobile

Helps to mark text on windows mobile, because the contextmenu hides the
handles bars of the selection

This fixes a bug with cy.contains.

#634

#632

The modules need to run in the background and not block the shell, so 
that Cypress can run.

#631

Add tests for buttons.

This way it can be used for testing.

This helps accessibility in general and specifically allows testing for 
it.

#628