Draft: Resolve "Offline version reporting improvements"

Closes #1571

Things covered by this MR:

• Tweak severity level for Development releases - do not overwrite the severity to Warning level anymore. Only a feedback message is added.
• Raise the Version alert level to a red-colored error badge when Kea daemons mismatch was detected.
• Do not show Dev release in Kea/Bind9/Stork tables if latest Dev < latest Stable.
• Accept release metadata with empty currentStable, latestDev, or latestSecure fields
• Accept an array of security releases instead of a single security release in the release metadata.
• Update help tooltip content according to ARM updates done in #1566 (closed).
• Update the empty placeholder for the summary table.
• Update the URL for Cloudsmith stork and stork-dev repo packages.