obs-browser: Update version to 2.15.0
- Simplify JS function registration/definition
- Enable Ctrl+R on Linux and Cmd+R on macOS for Browser Panels
- Fix keyboard support in Interact dialog on macOS
- Remove fractional scaling ifdefs
- Remove unused variable definition
- Remap semi-transparent colors for linear blend
- Set user_agent_product in CEF >=91
- browser-panel: Manually unset XdndProxy
Matt Gajownik