After 63dc8f7ea0 `SPC '` started to ask
for "Run program" instead of opening the shell with the defined shell.
This commit remove the `call-interactively` that are causing this
problem. `SPC u SPC '` is still working as far as I tested.
This makes sure that all the setup happens at the same time. Previously
some setup happened at loading time of esh-mode while some happened in
eshell-mode-hook. Everything output between this (the first prompt)
looks different.
