Update underscore and backbone library to latest release

Can you add the minified version of the file please? We're getting that done while updating libs.

It means there needs to bee a { minified: true } option in the libraries entry, see the ckeditor entry for an example.

Apart from that: CKEditor, contextual, quickedit, toolbar and tour seems to be working still seems the couple of new versions didn't break our stuff. Might want to get Wim and/or Jesse to confirm as they ran into underscore (or backbone) version troubles way back.

Actually we might want to update underscore and backbone in the same patch.

We're getting closer to alpha and it's time to ship minified libs, we don't do much debugging anymore #1341792-57: [meta] Ship minified versions of external JavaScript libraries. Also I wanted backbone and underscore updated at the same time because the backbone update looks really harmless and it's the main lib that depend on underscore.

Frontend testing is always a PITA, so testing 2 related libs in 1 issue is faster than testing each 1 time in separate issues.

Porting tag from #2392917: Update JS lib: backbone to 1.1.2.

Attached patch updates :
backbone from 1.1.0 to 1.1.2 (minfied)
Underscore from 1.5.2 to 1.7.0 (minfied)

Everything seems to work fine except this error:

GET http://localhost/d8/sites/default/files/js/backbone-min.map; 404 (Not Found)

Which is related to Issue #2235299: Aggregation breaks use of library min.map files from included libraries

I am just fixing the test here.

+++ b/core/modules/system/src/Tests/Common/AttachedAssetsTest.php
@@ -245,7 +245,7 @@ function testVersionQueryString() {
+    $this->assertTrue(strpos($js, 'core/assets/vendor/backbone/backbone.js?v=1.1.2') > 0 && strpos($js, 'core/assets/vendor/domready/ready.min.js?v=1.0.7') > 0 , 'JavaScript version identifiers correctly appended to URLs');

This must be backbone-min.js

Ah, you're right. Attaching patch.

Great, thanks.

Toolbar, quickedit, tabledrag, views ui still work.

Please credit droplet as well for his work on the backbone update issue referenced:

git commit -m 'Issue #2393125 by hussainweb, droplet, mitrpaka, tarekdj: Update underscore and backbone library to latest release'

Committed/pushed to 8.0.x, thanks!

To be clear, should this commit resolve the GET http://localhost/d8/sites/default/files/js/backbone-min.map; 404 (Not Found) message mentioned in #8? I ask because I just did a fresh install with HEAD and I still see that message (on node/add/article ... havent checked anywhere else).

Source map won't affect general users. You could switch off Source Map supports in Chrome & Firefox's..etc.

(Or may be a follow up issue to remove them all from Core.)

I've opened #2424095: Add missing *.min.map so automatic prettification of compressed JS works in firefox and chrome to fix the *.min.map 404's