Cron Preview in Edit Mode, throws errors while editing

Description

Cron in sidebar allows you to edit and real time be provided with preview of dates. While a user is typing errors can be thrown to the main window. Like this:

Errors should not be possible while mid-edit. It would be better that errors in cron always yield an empty preview and that it is not possible to Save changes to the cron unless it is a valid expression.

Note that the developerMessage returned by REST endpoint, generally provides more useful info:

Environment

None
Done

Assignee

Tim Harsch

Reporter

Tim Harsch

Labels

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Reviewer

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Story point estimate

None

Story Points

2

Components

Sprint

None

Fix versions

Affects versions

Priority

Medium