Redesign data model loading process

[yanfali]

Information

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Description

When the keyboard loading process was designed, I was pretty new to vue and vuex, so the keyboard loading process is quite confusing and easy to follow. Transitioning from non-vue code, made this even messier. It would be a good time to look at the keyboard metadata loading process and redesign, so that

• the flow is clearer
• it's better documented
• it's easier to maintain

Right now it's a bit of a spaghetti mess of promises, while we wait for async tasks for finish