Fix unicode issues when exporting ODT
Fix unicode issues when saving a project
Fix exporting a document loaded from a project file
Fix issue with the pic's row in convertPixbufToImage
Refactor the Editor's update method

Replace the code with the DataBox's updateImage.
Set parent in PreferencesDialog
Use a scrolled window in the Preferences dialog

More specifically, the recognition preferences' contents is too big
so the scrolled window will allow the dialog to be smaller.
Set a specific size to the Preferences dialog
Wrap big label in the Preferences dialog
Add parents to all dialogs
Remove unused WarningDialog
Set "export to ODT" button's icon to a valid one
Remove unused class BoxEditor_DataBox_Controler
Move the contents to widgetPresenter