Replace alert() messages in form validation with something better-lookin

[Nicklas Nordborg]

If an error is detected when validating a form before saving it an error message is usually displayed in a popup using the alert() function. Nothing wrong with that, but we can do a bit better with modern browsers. See the attached image for an example.

[Nicklas Nordborg]

(In [6175]) References #1734: Replace alert() messages in form validation with something better-looking

Implemented a function for this: Forms.showNotification which should replace all calls to alert(). The function will automatically focus and select the specified form field if possible. The notification automatically disappears when the user starts typing or when the field loses focus.

The setting dialogs in the "BASE" menu and the calendar popup has been used for testing.

[Nicklas Nordborg]

(In [6176]) Fixes #1734: Replace alert() messages in form validation with something better-looking

Should be fixed in all other dialogs now, and also in some list pages and other places.

Added support for putting the notification to the right of the element. Use: Forms.showNotification(element, msg, null, 'pointer-left')

[Nicklas Nordborg]

(In [6189]) References #1734: Replace alert() messages in form validation with something better-lookin

Seems like [6176] contained some code that had been commented out/removed due to debugging.

[Nicklas Nordborg]

(In [6450]) References #1734: Replace alert() messages in form validation with something better-lookin

Add parameter to force left- or right-align of message.