Overwrite json_metadata.app when edit a post on Busy

[bonustrack]

It seem we only set the param json_metadata.app when user publish a post, but not when user edit his post on Busy. That should be the case.

[Sekhmet]

Won't it cause problems if an app uses json_metadata.app to categorize posts?

[bonustrack]

@Sekhmet I don't think 3p app use json_metada.app to filter post because steemit.com is already overwriting this field

[Sekhmet]

Alright,

it should be fixed by changing priority of metadata tags (we should get original metadata tags first, and then apply ours).

busy/src/client/post/Write/Write.js

Lines 199 to 212 in b721860

	let metaData = {
	community: 'busy',
	app: `busy/${version}`,
	format: 'markdown',
	};
	// Merging jsonMetadata makes sure that users don't lose any metadata when they edit post using
	// Busy (like video data from DTube)
	if (this.props.draftPosts[this.draftId] && this.props.draftPosts[this.draftId].jsonMetadata) {
	metaData = {
	...metaData,
	...this.props.draftPosts[this.draftId].jsonMetadata,
	};
	}

[emre]

I am on it.