Previous implementation only built test list when investigation textarea
was empty, preventing {{Tadvise_test_list}} from showing when textarea
had content.
Changes:
- Separated test list building from textarea population logic
- {{Tadvise_test_list}} now always populates when rx_investigations exists
- {{investigation}} still gets comma-separated fallback when textarea empty
- Both placeholders now work independently
Test list HTML output format:
<ul style="margin:3px 0 0 16px;padding:0;list-style-type:disc;">
<li>CBC (Complete Blood Count)</li>
<li>ECG (Electrocardiogram)</li>
<li>HBA1C</li>
</ul>