Feature Request in Calibre Viewer

[Enterio]

Could the panel on Styles from the Viewer be modified with a simple and elegant adjustment?

Instead of just one text box for the CSS Code, please make 2 panels side by side (one for scroll mode, the other for page mode), each with a (A) drop-down list of CSS profiles and (B) a text box of CSS code displaying the profile's code; each panel would have (1) Add, (2) Remove, (3) Modify and (4) Set as preffered CSS profile for that particular layout mode. There should be a "Default" preffered mode in the list with no CSS code attached for each panel.

Because whenever I change the layout from page mode ► scroll mode, it messes up everything because the CSS code is adapted for one layout, and I have to change the setting manually and paste code from a text file each and every time adapted for that layout mode. This would save A LOT of time, and would be VERY handy.

Thank you for your consideration!