Moved rendering of the DiffSpinner into MergeRequestController.update()
Moved rendering of the DiffSpinner into MergeRequestController.update()

Otherwise users would be left with a spinner and nothing happens if
they select the same range as they're currently viewing

Gitorious-backup/mainline,altrair/gitorious-openstack,altrair/gitorious-openstack,njall/wel-gitorious,crazycode/gitorious,feniix/gitorious,vymiheev/Gitorious-OpenStack,elcom/gitorious,rae/gitorious-mainline,rae/gitorious-mainline,Gitorious-backup/franklin-devs-phpbbhub,adg29/asi.gitorious,SamuelMoraesF/Gitorious,deld/gitorious,Gitorious-backup/yousource-features,crazycode/gitorious,tigefa4u/gitorious-mainline,njall/wel-gitorious,gitorious/mainline,gnufied/gitorious,balcom/gitorious,balcom/gitorious,njall/wel-gitorious,Gitorious-backup/yousource,water/mainline,adg29/asi.gitorious,SamuelMoraesF/Gitorious,balcom/gitorious,Gitorious-backup/yousource-features,Gitorious-backup/yousource,water/mainline,Gitorious-backup/yousource,Gitorious-backup/yousource-features,victori/gitorious-jruby,gnufied/gitorious,elcom/gitorious,Gitorious-backup/vsr-mainline,SamuelMoraesF/Gitorious,tigefa4u/gitorious-mainline,Gitorious-backup/franklin-devs-phpbbhub,cynipe/gitorious,adg29/asi.gitorious,cynipe/gitorious,Gitorious-backup/base_uri-fixes,water/mainline,grjones/gitorious-submodule-dependencies,cynipe/gitorious,spencerwp/mainline,vymiheev/Gitorious-OpenStack,tigefa4u/gitorious-mainline,gitorious/mainline,victori/gitorious-jruby,Gitorious-backup/vsr-mainline,vymiheev/Gitorious-OpenStack,rae/gitorious-mainline,Gitorious-backup/yousource,Gitorious-backup/base_uri-fixes,Gitorious-backup/franklin-devs-phpbbhub,Gitorious-backup/vsr-mainline,deld/gitorious,Gitorious-backup/vsr-mainline,Gitorious-backup/base_uri-fixes,SamuelMoraesF/Gitorious,spencerwp/mainline,elcom/gitorious,elcom/gitorious,ericbutters/eric-gitorious,adg29/asi.gitorious,Gitorious-backup/mainline,deld/gitorious,ericbutters/eric-gitorious,crazycode/gitorious,grjones/gitorious-submodule-dependencies,gitorious/mainline,spencerwp/mainline,spencerwp/mainline,grjones/gitorious-submodule-dependencies,Gitorious-backup/yousource-features,feniix/gitorious,victori/gitorious-jruby,rae/gitorious-mainline,feniix/gitorious,altrair/gitorious-openstack,Gitorious-backup/mainline,ericbutters/eric-gitorious,Gitorious-backup/base_uri-fixes,Gitorious-backup/mainline,Gitorious-backup/franklin-devs-phpbbhub,gitorious/mainline,tigefa4u/gitorious-mainline,gnufied/gitorious