[BZ#150178] file/dir + patch mode

Submitted by Aidas Kasparas

Assigned to Stephen Kennedy

Description

How about mode, where file or directory + patch-file (which potentially produce .rej files if run via patch command) is opened. I would like meld to apply changes for cleanly applicapable chunks and let me sort out [parts of] chunks, which would be rejected.

I'm not sure how related this is to #150065.