fix(settings): Add nextTick to saveChanges

[marcelklehr]

to alleviate race condition introduced by vue lib update.

• Resolves: [Bug]: Changing TaskProcessing selects wrong provider #49335

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[susnux]

Could also be:

onSaveChanges() {
    this.$nextTick(() => this.saveChanges())
},

both works

[nickvergessen]

Fixes the settings not saving (after recompiling locally)

[marcelklehr]

/compile