First, this avoids the duplication of the regular expressions for tickets, wiki page names, etc.
Second, we gain the ability to quickjump to log ranges, revisions defined using `rXYZ` (#2881) and all the link resolvers that were not previously considered (attachment, query, log, etc.)
Likewise, this automatically extends the quickjump feature for TracLinks defined by the `IWikiSyntaxProvider` plugins (provided they return `Element`s objects with a `href` attribute, typically `html.A(href=...)`).
This required a small refactoring of the Formatter, a step in the direction of separating the parsing and the formatting phases in the Wiki engine.
