"use strict" in most (if not all) our javascript

[Carreau]

• fix one variable leaking in global nameespace

For more about "strict mode" read this.

TL DR, It's faster, less error prone and more secure.

I made it at "function level" instead of "script level" to allow concatenation with unstrict script.
But I wouldn't mind having it at script level.

[Carreau]

Any comment on this one ? anyone ?

[jakobgager]

If havve no realy clue what strict mode does, however following your given site Browsers don't reliably implement strict mode yet, so don't blindly depend on it
it may be worth testing this thoroughly.
On the other hand, looking at a compatibility table (http://kangax.github.io/es5-compat-table/) I suggest it should be enough if someone with Konqueror 4.9 could test this (Konq 4.9 seems to be the current release in Kubuntu 12.10).

[Carreau]

Browsers don't reliably implement strict mode yet, so don't blindly depend on it

We don't plan on relying on any feature of strict mode. It will mainly be usefull in development to throw on errors like assigning to global variable (forgotten var keyword) or things like that.

[jakobgager]

The Converting mistakes into errors section sounds helpful.
And if the other changes does not introduce problems I'm +1 on this.

[minrk]

I think this is a good idea, and the change is quite straightforward.

[Carreau]

Merging this.