No access to the general transport network overview

[drzraf]

The transport lines are not shown by default:

They are only if at least one character is typed:

This is suboptimal because it keeps the user from getting a global overview of the transport network.
In many cases, getting the full map, this is the most important feature someone needs
(Obtaining them one-by-one, only if we know their name is not the most common situation...)