Issue 4543: Don't jump to next CSS property value's inline editor, if a semicolon is entered inside a string

Steps to reproduce

  1. Inspect the white <div> above (#element1)
  2. Switch to the HTML panel and there to the Style side panel (if you're not already there)
  3. Click on the value of the background property to start editing it
  4. Move the text cursor between the g and the b of pngbase64
  5. Type a semicolon
  6. Click somewhere outside of the input field to stop editing

Expected Result