Before this commit, the user could having a bit difficult to read a
row in Sales or Profitability section shown in right side panel of
project update view since there is not much space between 2 rows.
The idea is to add a color when the user hover a row to correctly see
the row that he sees.
This commit greys a row when the user hovers a row like we did for the
line in the milestone section in the right side panel.
task-2814466
Part-of: odoo/odoo#88219
Xavier BOL (xbo)
153f35ef7f