i18n locales loading is broken

[bilravil]

Describe the bug
From the 0.165.0 version (this commit) is not working i18n localization files loading.
My localization file is placed in packages/editor-ui/src/plugins/i18n/locales directory as well.
With the same environment and settings a localization loading is working in previous n8n versions (0.164.0 and lower)
Link to my comment from PR with my investigations.

To Reproduce
Steps to reproduce the behavior:

1. clone n8n git clone https://github.com/n8n-io/n8n.git
2. install all dependencies lerna bootstrap --hoist
3. copy localization file to packages/editor-ui/src/plugins/i18n/locales
4. set N8N_DEFAULT_LOCALE=ja to env
5. npm run build
6. npm run start

Expected behavior
n8n editor ui with settled language.

Environment:

• OS: MacOS Catalina 10.15.7
• n8n Version 0.165.0
• Node.js Version - v14.18.0
• Additional ENVs - N8N_DEFAULT_LOCALE=ja

[zerobig]

I fixed it.
This is due to the fact that NodeView.vue has not yet been initialized at the time of language installation. So watch defaultLocale is never called.

watch: {
...
	async defaultLocale (newLocale, oldLocale) {
		loadLanguage(newLocale);
	},
},

I just added a function call loadLanguage to mounted method:

async mounted () {
...
	try {
		await Promise.all(loadPromises);

		if (this.defaultLocale !== 'en') {
			try {
				loadLanguage(this.defaultLocale); // <= Here is what I added
				const headers = await this.restApi().getNodeTranslationHeaders();
				addHeaders(headers, this.defaultLocale);
			} catch (_) {
				// no headers available
			}
		}
	} catch (error) {
...
}

Let someone else do the PR.