fixes #1734
cleaning things a bit, see #1734
Merge pull request #56 from aabadie/1734_item_reset_bug

fixes #1734
set a diffusion toolBox style in the filtering workspace
Makes the button export last trans work
Beginning of work on export transfo buttons in undoredotoolbox
correct bug 1733
Set fancy choose filter comboBox
edit on default suffix for savetransf
Avoid weird behavior when switching workspaces
bug corrected in medDatabaseModel::updatePatient()
Add about plugin button to filtering toolBox
make the plugin methode of medFilteringAbstractToolBox virtual pure, adjustSize() of QcomboBoxes
Corrects : -crash when export transfo of DiffDemons -Typo . Adds info in
filedialog box
Harmonize thumbnail generation for rgb images (images that were not multiple of 128*128 were not nicely handled. A bit better now.
Output of filtering process replace the existed one instead of produce an overlay
Resolves issues with Linux compilation
Removes all the code concerning export All transfo button
Improves export transf button
Improves export transf