4K/ Multiple Monitors Break Drag-and-drop functionality

[hafazilla]

When Filezilla is open on a second (i.e., not primary), 3840 x 2160 monitor, where the primary monitor is 1920 × 1080, dragging files from the local site window on the left to the remote site window on the right results in unexpected behaviors. Specifically, rather than copying the files to the server, files are moved from the local site directory to an adjacent directory on the local site.

Which directory the files get moved to depends on structure, but in the most recent incident, files were moved from the directory, "kor" to the directory, "img" on the same level. Note that there were 3 directories between "img" and "kor".