Warnings system

[AYZ]

Nice to have a system for dealing with warnings:

1. warning_create (sCode) - creates an entry in the array of warning objects
2. warning_display (sCode, sTitle(?), sMessage)
3. warning_isHidden (sCode) - returns true/false
4. warning_setIsHidden (sCode, yes/no)
5. warning_clearAllHidden()

Then, when a warning occurs:
a) warning_display (sCode, sMessage)

• if sCode does not exist, warning_Create (sCode)
• if warning_isHidded (sCode) return
• display sMessage in dialog, along with checkbox: Don't display this warning again.
• warning_setIsHidden(sCode, checkbox value)

And, in Settings:

• for each warning, display: checkbox: Display sCode warnings.
• maybe, display: button: turn on all warnings