XWIKI-22138: Tips panel does not have underline style for links in subwiki

[Sereza7]

Jira URL

https://jira.xwiki.org/browse/XWIKI-22138

Changes

Description

• Replaced the classic CSS class selector with a class contains selector

Clarifications

• The subwiki add their IDs before all of the panel specific classes. There's no other robust way to select the Tips Panel than using this class. In order to still use it, I decided to go for an attribute selector based on class. This allows to use a contains boolean that would not be possible to do with the . notation.
• In the new class selector, I added a space after the HelpTipsPanel. This makes sure we don't match any panel in a wiki that would have HelpTipsPanel for ID. I think the selector as it is now is robust enough. It's not perfect and could still be matched unexpectedly in some very niche situations e.g., using a panel with an ID which contains the string HelpTipsPanel.

Screenshots & Video

Before the changes proposed in this PR

After the changes proposed in this PR

Executed Tests

Style changes only, tested manually on a local distribution with:

• the main wiki
• two subwikis

See the screenshots above. After updating the color theme (reloading the LESS content from the updated general.less), we could witness that the anchors are properly hit by the new css selector.

Expected merging strategy

• Prefers squash: Yes
• Backport on branches:
  • None