Feature request: support regular expressions #35

Often, there's a need to search the page for patterns, like

• translat[e|or] (not "translation")
• poss?ible (including typos)
• 4\d\d (all 4xx HTTP errors)
• error|problem|bug|issue|fail|break| not |n’t|fatal|missing|stopped|undefined|critical|warn|incorrect|wrong|crash (error log/support forum search).

It would be great to have this in the Quick Find extension.