Was first introduced by 538c13f3

We should process clipboard formats in order of descriptive-/
usefulness -- however png/bmp are special cases (as browsers
will add an html equivalent to their clipboard when copying raw
images, with the raw image being the preferred target format)
and were therefore moved up in the paste-preference list,
mistakenly it was assumed that GDI Metafiles should be subject
to the same treatment, but it appears that Word (and Wordpad?)
will provide both RTF (preferred) and GDI for formatted text.

Change-Id: I731986fc9d70e7aeb64e53764e32cfec3e27eca1