Only warn about WebAdmin if a `webadmin.*` component is actually enabled. Also, uninstalling the plugin is not necessarily a sound advice if a user has admin extensions installed, which will generally (or at least in some cases) continue to work with 0.11.
Only warn about WebAdmin if a `webadmin.*` component is actually enabled. Also, uninstalling the plugin is not necessarily a sound advice if a user has admin extensions installed, which will generally (or at least in some cases) continue to work with 0.11.

git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@5909 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,jun66j5/trac-ja,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,walty8/trac,walty8/trac,netjunki/trac-Pygit2,jun66j5/trac-ja,jun66j5/trac-ja,netjunki/trac-Pygit2