Button to clear stations

[psolyca]

Is your feature request related to a problem? Please describe. When using the "Add system" feature on station haul, there is no simple way of resetting the value. One have to click on each station to delete them.

Describe the solution you'd like Adding a reset button on each input (start and end) could be better than reloading the page or clicking each line.

[psolyca]

Here we go. What do you think of it ?

Same for end station. The button appear when 5 stations are selected. It is lower than other buttons due to floating box but it is not shocking.

[awhipp]

Looks good to me!