As a developer, I want to make the app as bug-free as possible (CSS basics)

[SamuelPelletierEvraire]

Description

As now the app have some css bug that need to be fix before the release of the refactored app.

List of bugs

• The submit button doesn't have the same minimum width as the FileList and Dropzone components.
  

• The preview of the picture in the Dropzone wiggles when hovering over the FileElement.
  

• The picture resizing function cause unwanted border on bigger image.
  

• User popup menu first row should not be clickable:

• First row of the user menu popup should not be hoverable.

• The hovering don’t fill all the row height.
  
  

• Selectable text on side menu title (Should not be selectable):