+ passage du logo de l'application par un chemin relatif

- Uniformisation de l'affichage entre DMM et Element structurant
- Ajout d'un rectangle pour signifier le centre de l'ES

Solved the display problem of double images, propose offset and scaling operation for images with negative values, created a channel to send messages from low level widgets to the information bar

adapt structuring element display according to the scale and add possibility to whiten black pixels of the structuring element

Please, try to avoid absolute path fix on windows