Added 'mode' setting to print_settings variable which controls the printer resolution
Corrected documentation of margin variable in print_settings
Fixed misnamed force_js_confirm variable in example config.
Added override_alerts, an option which surpresses JavaScript alerts.
Cleaned up WCGWebPage.javaScriptAlert
Cleaned up WCGWebPage.javaScriptConfirm
Changed name of variable override_alerts to suppress_alerts
Corrected merge conflict in browser.py
Merge branch 'hunternet93-qt5'