Fix most issues for continuous view panel

This commit fixes most of the continuous view panel issues : staves alignment (#32291), multiple lines (#32201), position (#32221), off center (#32206), 5-6 tab staves (#32211), incorrect layout (#32231), appearance (#32236)

Only multiple staves instruments names (#32191) is still to be fixed. Thougu, I don't know what would be the best solution (where to write the instrument name) and I don't have time for it for the moment.