* fix a bug for new orders budget : the Asort1 was displayed by default. Now, it's the sortN_authcat of the 1st budget (the one selected by default)
* change in GetBudgetAuthCats : returns all auth values used by at least one budget (not Asort* categories, as previously)
* code cleaning in GetAuthvalueDropbox (and select aqbudgets.* instead of *, to avoid data corruption due to duplicate column name)
* there can be more than 1 active period. This has been added to deal with temporary budgets (like "10000€ to spent in the next 3 months")
* all active budgets are retrieved
* budget available for everyone now displayed correctly
also :
* fixing some hardcoded values
* removing a warn
