In bulk email sending format the email body properly

Description

JETI doesn't handle properly the email body in case of the different editors (Jira, Jeti, Jeditor) with different body type (HTML, text).
We need to clear fix the various email types in all 6 possible ways.
Rich text editor does not work in bulk email sending when an issue list is being sent in email. HTML tags are shown in the resulting emails.

Additionally add feedback, if the subject is empty.

Environment

None

Preliminary Test Cases

Send bulk emails:
html - reach text editor
html - jira editor
html - jeditor
text - reach text editor

Assignee

András Németh

Reporter

Tibor Hegyi

Labels

None

Access to limited visibility issues

None

Product platform

None

Module Dependency

None

Ready for Development

Specification is ready, linked in issue, reviewed by Quality
Issue is estimated
Issue summary and description are phrased clearly, ready for release notes

Story Points

8

Time tracking

6h

Feature Testing Estimate

1.5

Components

Sprint

Fix versions

Priority

Major
Configure