C51-384: Added case tokens on Email Activity Modal

[deb1990]

Overview

As part of this PR, "Case" tokens has been added to the Email Activity Modal.

Before

After

Technical Details

In CRM/Contact/Form/Task/Email.php, added a block of code to add the Case Tokens when caseId is present.
The added code is similar to

civicrm-core/CRM/Contact/Form/Task/PDF.php

Line 124 in b8ebe34

if (isset($this->_caseId) || isset($this->_caseIds)) {

[civibot]

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[swastikpareek]

Looks good.

[shitijg]

passed internal Compucorp testing.
Gitlab ref: https://lab.civicrm.org/dev/core/issues/668
@colemanw

[seamuslee001]

Jenkins re test this please

[colemanw]

• General standards
  • (r-explain) Pass
  • (r-user) Pass: More consistent behavior between email and pdf screens.
  • (r-doc) Pass - I think this is self-explanatory and doesn't need user docs.
  • (r-run) Pass: Tested by @shitijg
• Developer standards
  • (r-tech) Pass: Code matches existing code in the PDF system.
  • (r-code) Pass
  • (r-maint) Pass
  • (r-test) Pass - I think we can do without one here.

[colemanw]

Test fails unrelated.