Improve progress bar styles

[damsfx]

Update progress bar styling

Fix #1000

Before :

After :

Changes :

• General :
  • Added striped background to active progress bar
    The background was animated, but without stripes it wasn't visible.
• In list :
  • Set default height equal to cell line-height, maked use of css variable so than the user can still set a différent height.
  • Added background color
  • Added a slight box shadow for better visibility of progress bars at 0%.
    Preferred to border for greater smoothness.
  • Added a background color when hovering over a line in the list to match the hover color.