A UI/UX consistent RegEx/Wildcard selection where appropriate

We offer RegEx in a number of areas, but a regular Jane/Joe would most likely benefit more from a wildcard syntax (QRegularExpression::wildcardToRegularExpression), which they surely are more likely to be familiar with.

We probably need a more systemic approach to this. I suppose offering an "options" button next to applicable text inputs with "Use Regular Expressions", "Use Wildcards" and "Case Sensitive" switches would work, akin to e Konsole's or Kate's find bar settings showcased in the comments in system/dolphin!74 (comment 136631)

Moreover, we should consider approaching the regex usage in automatically created filters differently, e.g. possibly conceal the the implicit regex symbols by default, to avoid confusion as exemplified by this post: https://forum.kde.org/viewtopic.php?f=69&t=170270#p443335