Merge remote-tracking branch 'origin/1.1.x_branch' into 1.2.x_branch

# Conflicts:
#	CHANGELOG.md

src/constants.js

@@ -87,6 +87,8 @@ exports.IPC_Check_Installed_Reply = 'check_installed_reply';
 
 exports.IPC_Check_Mount_Location = 'check_mount_location';
 
+exports.IPC_Cleanup_Releases = 'IPC_Cleanup_Releases';
+
 exports.IPC_Delete_File = 'delete_file';
 
 exports.IPC_Detect_Mount = 'detect_mount';