support file size display in clip properties display
Review Request #128921 - Created Sept. 15, 2016 and submitted
Adds a "File size" row to the clip properties display for those clips that possess a file size (as reported through the property "kdenlive:file_size"). The file size is displayed in the same way as, for instance, Dolphin's file properties dialog shows the file size; in particular, proper units and separators are used.
Testing on recent Kdenlive git master on Kubuntu 16.04LTS with recent KF5 and Qt updates.