Problems with Ractive.set(".foo")

[dagnelies]

Hi,

Here is the fiddle:

http://jsfiddle.net/50hLj2r0/1/

As you see, adding with a "dotted" keypath adds the data to it but does not update the view. There is also no warning that ".foo" shouldn't be used in setters, like the other restricted references.

This ticket is actually twofolds:

• a warning when using "Ractive.set / push / ..." using restricted references
• properly cancel the action instead of doing something wrong or throwing an error

[dagnelies]

Oops, duplicate of #1958