ve.init: Fix broken dependency between ve.js and ve.init.platform

Depencency tree looked like this
* ext.visualEditor.viewPageTarget
  - ve.init.platform
  - ve.init.target
** ext.visualEditor.core
   - (most ve.* classes)
*** ext.visualEditor.base
    - ve.js

Some of the ve classes are calling ve.msg from the global scope
at load time (e.g. in the definition of static properties or in
constructors of classes that were immediately instantiated in
the same file).

Platform needs to be initialised in the base module.
ve.init.Platform.js was already there, but that's just an
abstract base class. The the ve.init.platform property is set
from the implementation classes' files.

Updated makeStaticLoader.php and re-ran for test and demo html.
The fake "Standalone Init" module is now gone, which shows that
this was needed as test/ and demo/ already put their platform
code in/after the 'ext.visualEditor.base' module in the html.

Bug: 45175
Change-Id: I47d7d92495974572194700c98a219d22ecbfaf4b
Merge "ve.init: Fix broken dependency between ve.js and ve.init.platform"