* 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)
for each budget period and budget, the library can enter planning on branches, itemtype, month or any auth_value selected as planning category for a given budget