Update last update when the formula value changes.
If a formula is calculated and it does not alter the current
cached value, it's not updated (not value nor last_update)
Load formula command, and bound hmi instances to a Profile
Forgotten SVG of europython presentation, and final versions
Refactor xls read routines to be command class independet.
Remove relation from Formula to screen
Relations between Formula -> EG -> Screen
Remove tag attribute from formula in favour of FK
Object tools for Import from XLS in admin
Commands and formula changes
Change admin colors
Javascript for formula admin
Delete old code
CSS with background image in administration