title: Android Studio 3.5 Canary 7: “Apply Code Changes” is disabled
body: <p>I am using <strong>Android Studio 3.5 Canary 7</strong>. When I debug my project, "<a href="https://developer.android.com/studio/preview/features/#apply-changes" rel="noreferrer">Apply Code Changes</a>" is disabled in the menu. At one time this worked on my project, but today doesn't. What settings should I check to allow this to work?</p>