1.3.1 Linux RC

Highlights from this release:

• Notification displayed in History tab when the base branch moves ahead of the current branch - desktop#4768
• Repository list displays uncommitted changes indicator and ahead/behind information - desktop#2259 desktop#5095
• Option to move repository to trash when removing from app - desktop#2108
• Support default branch detection for non-GitHub repositories - desktop#4937
• Status parsing significantly more performant when handling thousands of changed files - desktop#2449 desktop#5186

For more information refer to the release notes on desktop.github.com.