Add a toggle button to flip the graph

[marcopierobon]

Scenario 1: flip the graph when no simulation have run
As a simulator user
Given the simulator has not run
When I click on the flip graph button
Then Nothing happens on the screens

Scenario 2: flip the graph and start the first simulation
As a simulator user
Given I pressed the flip graph button
When I click on run simulation
Then the current graph does not flip
And future simulations will stay flipped

Scenario 3: try to flip the graph during a simulation
As a simulator user
Given a simulation is running
When I click on flip graph
Then button is not clickable
And nothing happens