Disable "Open as New" ?

Hi everyone! I noticed that I keep losing my progress, because I accidentally choose "Open as New" instead of "Merge Into Scene" in the menu within the Smart Content tab. I know it's my own dumb fault, but it just keeps happening. I was wondering if there is any way to disable this option?
Comments
Try double left clicking everything instead of right clicking them, as only an actual scene file needs to be right clicked > merge to get it into an existing scene.
Doesn't it warn you, and give you the chance to save or cancel? OK, no it doesn't - please report that as a bug.