[experiments] Fix monitor command

The handling of the get call was not updated after the webapi module
refactor. This patch fixes this and also properly handles the case
the first call does not work and thus happens before the full ncurse
setup occures.

Fixes #66
4 jobs for 66_fix_monitor_command in 8 minutes and 15 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #192408
docker-build
build_linux_36

00:02:50

54.0%
passed #192409
docker-build
build_linux_37

00:02:49

54.0%
passed #192406
macosx
build_macosx_36

00:08:15

54.0%
passed #192407
macosx
build_macosx_37

00:08:03

54.0%