Concepts - Mode: Add missing differences between production and development

[edmorley]

From:
#1856 (comment)

The production mode enables a few more plugins than currently listed, eg FlagIncludedChunksPlugin, OccurrenceOrderPlugin, SideEffectsFlagPlugin, FlagDependencyUsagePlugin:
https://github.com/webpack/webpack/blob/4f399322ad1922ae7bafdeea1c4d83bf9c9851a7/lib/WebpackOptionsDefaulter.js#L192-L207
https://github.com/webpack/webpack/blob/fde018300aa52262c384e937c408d5dd97d62951/lib/WebpackOptionsApply.js#L307-L318

And development mode also enables NamedChunksPlugin.

Page in question:
https://github.com/webpack/webpack.js.org/blob/master/src/content/concepts/mode.md

[EugeneHlushko]

please close this one @montogeek

[edmorley]

@EugeneHlushko why was this closed?
The issue still applies to master and next.

[EugeneHlushko]

Hmm you are right, my mistake here @edmorley
Will fix this asap

[shelldandy]

This has been added properly on text but not on the code-diff that appears below