[fix] Force use of 2 char langcode. Prevent double load of english json file.
[fix] Wrong undefined type check.
[fix] Could not install app with no install arguments #39
[enh] Force scrollTop on page transition.
[fix] Do not use websocket by default.
[enh] Redirect to homepage on 404.
Revert "[fix] Do not use websocket by default."

This reverts commit e09c9ee7a0c5fef5c1d56fb94eb1cace1c8c0825.

It's normally not needed anymore since the crash due to WebSocket
on some platform should be fixed in the moulinette - when the api is
started with --no-websocket parameter.
Update fr.json

Relecture
Update en.json

Relecture
Merge pull request #40 from M5oul/patch-2

Update fr.json
Merge pull request #42 from M5oul/patch-3

Update en.json
[fix] Improve french translation (backup_warning).
[fix] Do not pass empty args to moulinette on app install.
[fix] Comment out console.log call.
Revert "Update en.json" #42

This reverts commit a82fd5f19ce871dd9c3fb42529b241223fc23228.