Add functionality to link to privacy statement in the "About" popup

[johnaohara]

Describe the bug

To comply with legal requirements, a privacy statement should be made available to end users. This can change between installations, so the privacy statement should be a configurable URL that can displayed as a link in the about popup

[lampajr]

Hey @johnaohara, if I correctly understood this would be about adding new "row" here:

where we would show the privacy stmt configurable URL.

Here two doubts:

• I still do not have fully clear how you were thinking about its configurability 😕
  • I was thinking to make the URL configurable through env variables/java props in backend and return it as part of the VersionInfo object [1], wdyt?
• Do we already have a default to use?

[1]

Horreum/horreum-backend/src/main/java/io/hyperfoil/tools/horreum/svc/ConfigServiceImpl.java

Lines 58 to 62 in 3e54bbc

	public VersionInfo version() {
	VersionInfo info = new VersionInfo();
	info.version = Version.VERSION;
	info.startTimestamp = startTimestamp;
	return info;