[FIX] modules: Restore module pref errors display (lost in r48366 bootstrap integration)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52413 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] look & feel: Hide the Shadow Layer tab when not using the shadow layer layout (classic)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52414 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Switch Theme: Explain why the switch theme module doesn't work when using the default bootstrap "Theme selection"

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52415 b456876b-0849-0410-b77d-98878d47e9d5
[ENH] modules: Display an individual module_error as an error

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52416 b456876b-0849-0410-b77d-98878d47e9d5
[MRG] Automatic merge, branches/13.x 52396 to 52416
Conflicts fixed in
	templates/footer.tpl


git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52417 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] modal: Duplicate id

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52418 b456876b-0849-0410-b77d-98878d47e9d5