Messages: update tooltips about supporting regexp

Update tooltips as defined in messages.properties to inform about
support for regexp syntax in IdP Scope and eduPersonEntitlement values.

Code for these features has already been long in but the tooltips were
stating regexp syntax is not supported.

Also added a comment noting that the message
help.fr.serviceprovider.attribute.specvalue is unused
(and is also identical to help.fr.acs.specvalue)
Base: Layout: tooltip in IdP/SP _create org select

Add a tooltip to the Organization selection in the IdP/SP create page.

Specifically, the tooltip is instructing the user to first create the
organization if it is not on the list yet.  (And also to wait for the
approval completed).

Intended to help reduce the number of registrations being entered under
wrong organizations.
Base: support for alert in IdP org selection

Add support for adding an alert to avoid multiple IdPs under a single
Organization.

For federations running a DS using the metadata as the source for
listing the IdPs (under their Organization name), add support to warn
users not to register multiple IdPs under the organization.

This is a (blue) alert box displaying above the Organization select
listbox on the IdP create page - but displaying only if the text is not
blank.

Default branding sets this to blank, but also has a commented out entry
with suitable text and instructions on when to uncomment the entry.
Branding: Welcome: Create Org/IdP/SP hint hooks

On the welcome page, add hooks above the Create Org/IdP/SP buttons to
allow putting additional hints in the branding.

In the default branding, set the hints to blank (no change), but also
provide commented out versions that provide suitable additional hints -
specifically targeting new users with instructions to FIRST register an
Organization, THEN proceed with registering an IdP or an SP.

No change to the UI if accepted with blank values included in the
default branding.
Messages: update create-IdP/SP select-Org tooltips

Update the wording in the tooltips displayed next to Organization
selection on the IdP/SP registration page.
Merge pull request #180 from University-of-Auckland/develop-ui+tooltip-clarifications

UI and tooltip clarifications