Io-sdk f.e. bugs and enhancements

[tkdudine]

After a significant test session of the single message input, I have some issues tu submit:

• please add a "rotella che gira!" after a click on a button.
• generally, it is necessary to have a field description and a specific "help" if the content must have a specific data_type:

• the field Notice Number (that is "codice avviso pagoPA") must be 18 legght with first digit [0123], but you can know this only from the error you recive after a submit. The error code has a regexp which isn't readable fron an end user! Another suggestion: the Notice Number for pagoPA has a specific format, why do not check it completely?
• The amount field does not whant the separator so 1 is € 0,01 and 101 is € 1,01 ... not good for end user
• markdown field must be 80 chr lenght ... you discover it from the error

• single message send: after message is sent (OK or KO), both the buttons "nuovo messaggio" che "single message" doesn't work, if I press f5 then I get 404
• send message in develop does not check if the amount field is filled out
• invio message in production: if I send a message with the amount filled out but the notice number blank or vice versa or both blank, I get the error "error": "conversion error" that is neither correct nor understandable.
• the field due date for the payment isn't present in the message editor