Issue:

Configuring a pipeline script to be pulled from a P4 SCM causes just the forms to extend for the whole page messing with the UI(see attached screenshots). This also happens with the CVS Plugin and for the [P4 Plugin|https://wiki.jenkins-ci.org/display/JENKINS/P4+Plugin], it crams everything so far onto the side that you can not actually configure anything.

Steps to reproduce:

-Running in above environment

-Create pipeline job "TestPipeline"

-Add a "Poll SCM" schedule(this is not required but it will show the form messing up)

-Add a "Pipeline Script from SCM"

-Choose Perforce(Observe the forms are squashed on the right side making it hard to configure)

-Save job

-Go back into the configure screen

-Observe the forms becoming stretched

It would be best if the configure area would scale to the right so that the page can be configured correctly.