[Buildbot] #2961: Force schedulers with space in their name break the www interface

[Buildbot trac]

#2961: Force schedulers with space in their name break the www interface
----------------------+-------------------
Reporter:  Ben        |      Owner:
    Type:  undecided  |     Status:  new
Priority:  major      |  Milestone:  0.9.0
 Version:  0.8.9      |   Keywords:  www
----------------------+-------------------
 If a force scheduler has a space in its name, and we click on the button,
 nothing happens.

 The breadcrumb on top becomes 'Builder.forcebuilder', and in the console,
 we get:

 {{{
 GET
 http://scaphoid.gb.intevation.de:8020/api/v2/forceschedulers/force%20scanner
 404 (Not Found)
 }}}

 (Where 'force scanner' is the name of my scheduler)

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Ticket URL: <http://trac.buildbot.net/ticket/2961>
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Buildbot: build/test automation