"Buffer" for snippet merging in clipboard Viewer

[alexbull]

The idea here would be to use the same interface as the file buffer in the clipboard viewer to enable pasteboard merging.

 

Here's the workflow I'd envision:

 

1. Copy a bunch of separate things in no particular order

2. Go to the clipboard viewer, and then hit ⌥→ to add to the buffer. On actioning this (⌘C to copy or ↩ to paste directly), the buffer is merged.