fix(core): don't overwrite template parameters on missing value

[AndreyMarkinPPC]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 90.70%. Comparing base (5ebb9d2) to head (cdf15c1).
⚠️ Report is 225 commits behind head on main.

Files with missing lines	Patch %	Lines
libs/core/garf/core/query_editor.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #419      +/-   ##
==========================================
+ Coverage   88.23%   90.70%   +2.47%     
==========================================
  Files          61       82      +21     
  Lines        2600     4196    +1596     
==========================================
+ Hits         2294     3806    +1512     
- Misses        306      390      +84     

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