Filter numeric only fields in Widget queries

[ziv17]

Closing #2673

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 80.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 52.63%. Comparing base (400af13) to head (ebb68ce).
Report is 93 commits behind head on dev.

Files with missing lines	Patch %	Lines
...dgets/injured_accidents_with_pedestrians_widget.py	33.33%	2 Missing ⚠️
...ay/widgets/urban_widgets/urban_crosswalk_widget.py	33.33%	2 Missing ⚠️
anyway/widgets/widget_utils.py	90.47%	2 Missing ⚠️
anyway/models.py	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #2686      +/-   ##
==========================================
- Coverage   53.22%   52.63%   -0.59%     
==========================================
  Files         119      122       +3     
  Lines        9924    10153     +229     
==========================================
+ Hits         5282     5344      +62     
- Misses       4642     4809     +167     

Flag	Coverage Δ
unittests	52.63% <80.00%> (-0.59%)	⬇️

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[atalyaalon]

@ziv17 Not sure if necessary for this pr, but note that in news_flash table, for some reason yishuv_symbol is null even when yishuv_name exist, I suggest changing this and making sure we insert yishuv_symbol is inserted to news_flash table (and perhaps backfilling it).
Same for street1 and street2

[atalyaalon]

@ziv17 looks great! I
I added a small commit of a bug (not related to pr).
I want to merge but before that I need your response to the two comments, to make sure there are no bugs there

[atalyaalon]

@ziv17 thanks for the fix! merged :)