Fix #2276

[elazarg]

Also

• Simplify KilledAndInjuredCountPerAgeGroupWidgetUtils
• Avoid adding leading zeros for groups
• i18n for "unknown"

[codecov]

Codecov Report

Base: 55.36% // Head: 55.34% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (4763404) compared to base (0c0c401).
Patch coverage: 57.14% of modified lines in pull request are covered.

❗ Current head 4763404 differs from pull request most recent head 6a6904f. Consider uploading reports for the commit 6a6904f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #2289      +/-   ##
==========================================
- Coverage   55.36%   55.34%   -0.02%     
==========================================
  Files         109      109              
  Lines        8654     8638      -16     
==========================================
- Hits         4791     4781      -10     
+ Misses       3863     3857       -6     

Flag	Coverage Δ
unittests	55.34% <57.14%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ed_and_injured_count_per_age_group_widget_utils.py	70.90% <55.00%> (+4.75%)	⬆️
..._and_injured_count_per_age_group_stacked_widget.py	100.00% <100.00%> (ø)

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[atalyaalon]

widget generation fails - for example try querying locally
localhost:8080/api/infographics-data?news_flash_id=16577&years_ago=5&lang=he

anyway               | Traceback (most recent call last):
anyway               |   File "/anyway/anyway/widgets/widget.py", line 92, in generate_widget_data
anyway               |     w.generate_items()
anyway               |   File "/anyway/anyway/widgets/suburban_widgets/killed_and_injured_count_per_age_group_stacked_widget.py", line 30, in generate_items
anyway               |     raw_data = KilledAndInjuredCountPerAgeGroupWidgetUtils.filter_and_group_injured_count_per_age_group(
anyway               |   File "/anyway/anyway/widgets/suburban_widgets/killed_and_injured_count_per_age_group_widget_utils.py", line 41, in filter_and_group_injured_count_per_age_group
anyway               |     dict_grouped = KilledAndInjuredCountPerAgeGroupWidgetUtils.parse_query_data(query)
anyway               |   File "/anyway/anyway/widgets/suburban_widgets/killed_and_injured_count_per_age_group_widget_utils.py", line 71, in parse_query_data
anyway               |     dict_grouped[group_name][row.injury_severity] += row.count
anyway               | KeyError: '0-5'

[elazarg]

For some reason there's no "Unknown" here. I did not change that.