Incorrect end of life information on Dashboard

Steps:

1. Install v3.0.5 Open Source / OSS.
2. Log in to the back-office.
3. Go to Dashboard.
4. Expand the information with "GPL button".
5. Verify the information.

Actual result: Incorrect information about end of life:

 
Unfortunately 3.0.5 open source version has reached end of life, <a target="_blank" href="https://doc.ezplatform.com/en/latest/releases/updating_ez_platform/">please upgrade</a>. Tip: If you upgrade to eZ Platform Enterprise you'll get access to: A business friendly license, several productivity features, professional Support and longer maintenance periode of your release. 

Remarks: Dashboard information on v3.0.5 EE looks fine (screen-shot 2).
_____

Fix wrong dates: https://github.com/ezsystems/ez-support-tools/pull/53

Fix verbatim HTML in the alert box for:

• 3.0 https://github.com/ezsystems/ezplatform-admin-ui/pull/1421
• 2.5 https://github.com/ezsystems/ez-support-tools/pull/55