* commit '5c8558e293989094693f918a63b672301f1aeb55':
v1.21.1
v1.21.1-beta.1
Fix: Navigation to message via quote click didn't always work
mainWindow.close - be ready for null mainWindow
Ensure that Curve.async points to worker after startWorker call
Protect against unhandled promises when calling checkForUpdates
Reenable send when link preview is missing an image
# Conflicts:
# package.json