[Fixes bug #987066] Fixed memory usage issues caused by image previews in the Open Image dialog.
[Fixes bug #987066] Fixed memory usage issues caused by image previews in the Open Image dialog.

PintaProject/Pinta,Mailaender/Pinta,jakeclawson/Pinta,PintaProject/Pinta,Mailaender/Pinta,jakeclawson/Pinta,Fenex/Pinta,Fenex/Pinta,PintaProject/Pinta