UI code refactoring up to analysis

[JuliaS92]

• move most functions from pages to helper utils
• move software options to options
• turn options into functions as they depend on the session state
• add sidebar info to all pages
• remove the load options decorator
• comment out interpreter options as they don't exist

These changes facilitate testing of the indivudal functions and separating ui logic and design for callbacks.

I didn't do any file renaming to avoid merge conflicts as I saw that other branches had already done this.

[mschwoer]

LGTM