fix: setting default "view" query params to "all"

[npham49]

Issue: #1143

Reasoning behind bug: In the code for getViewData, by default statuses only contains "open", "started" and "planned", since https://fider.io/docs/api#list-posts also uses the same function to generate the sql, the returned posts will only have "open", "started" and "planned" statuses. This conflicts with the documentations.

fider/app/services/sqlstore/postgres/common.go

Lines 33 to 37 in e55a144

	statuses := []enum.PostStatus{
	enum.PostOpen,
	enum.PostStarted,
	enum.PostPlanned,
	}

Proposed changes:
Since the getViewData function is used across the app, updating statuses here might cause problems on other parts of the app, I decided to create a conditional on the route handler for the API to always set the view Query Params to "all" if it is not specified.

[mattwoberts]

Thanks very much @npham49. - hoping to get a new release out soon so this will be in it :)