Support opening multiple windows via init args.
Open about:blank if opening startpage fails.
Add win_id parameter to commands which need it.
Fix running of startup commands.
Move :later back from commands to utilcmds.
Fix getting URL for startup commands.
Make CommandRunner a QObject.
userscripts: Don't store a list of runners.
tabbedbrowser: Don't store a list of tabs.
webview: Remove dead search method.
Fix lints/bugs
Add multi window support to :restore/:restart.