fix: Nutrient search field added

[AshAman999]

What

• added a search box to filter on the nutrients selection page

Screenshot

Record_2022-04-23-07-35-52_cc729dbb1ea2c751a543590b5da9708c.mp4

Fixes bug(s)

• Allow to search for a specific nutrient in the nutrition edit mode #1452

[AshAman999]

Not sure about the deprecation warnings, didn't seem like it is cuz of the changes I made 🥲

[M123-dev]

It has nothing to do with this PR, a fix is already proposed and about to be merged

[teolemon]

@M123-dev @AshAman999 all tests are now passing.
looks great UI wise

[codecov-commenter]

Codecov Report

Merging #1627 (a3551f5) into develop (2ea0da3) will decrease coverage by 0.16%.
The diff coverage is 0.84%.

@@            Coverage Diff             @@
##           develop   #1627      +/-   ##
==========================================
- Coverage     8.86%   8.69%   -0.17%     
==========================================
  Files          161     164       +3     
  Lines         6623    6807     +184     
==========================================
+ Hits           587     592       +5     
- Misses        6036    6215     +179     

Impacted Files	Coverage Δ
...t_cards/knowledge_panels/knowledge_panel_card.dart	0.00% <0.00%> (ø)
...rds/knowledge_panels/knowledge_panels_builder.dart	2.17% <0.00%> (ø)
...s/product_cards/smooth_product_card_not_found.dart	0.00% <0.00%> (ø)
.../smooth_app/lib/data_models/onboarding_loader.dart	0.00% <ø> (ø)
...mooth_app/lib/data_models/product_query_model.dart	1.38% <ø> (ø)
...s/smooth_app/lib/data_models/user_preferences.dart	34.42% <ø> (+2.11%)	⬆️
...s/smooth_app/lib/database/dao_string_list_map.dart	0.00% <0.00%> (ø)
...ckages/smooth_app/lib/database/local_database.dart	0.00% <0.00%> (ø)
...s/smooth_app/lib/database/paged_product_query.dart	0.00% <0.00%> (ø)
...oth_app/lib/database/robotoff_questions_query.dart	0.00% <0.00%> (ø)
... and 30 more

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[M123-dev]

Heyy @AshAman999, looks great 👍🏼