fix: Flutter 3.0 fixes

[M123-dev]

What

• Fixes for flutter 3.0

---

Edit:

I know there are some

//ignore: use_build_context_synchronously

and better placable

if(!mounted)

but I'm in favor of keeping them like that for now and fixing them in a follow up PR to not make this PR bigger then it has to be

[monsieurtanuki]

Hi @M123-dev!
I agree with most of your changes.
Just a bit surprised by the removal of mounted: I would have added TODOs, because I guess we can expect unexpected behaviors.

[codecov-commenter]

Codecov Report

Merging #1814 (44b7539) into develop (2ea0da3) will decrease coverage by 2.25%.
The diff coverage is 2.28%.

@@            Coverage Diff             @@
##           develop   #1814      +/-   ##
==========================================
- Coverage     8.86%   6.61%   -2.26%     
==========================================
  Files          161     172      +11     
  Lines         6623    7821    +1198     
==========================================
- Hits           587     517      -70     
- Misses        6036    7304    +1268     

Impacted Files	Coverage Δ
...h_app/lib/cards/category_cards/abstract_cache.dart	0.00% <0.00%> (ø)
...p/lib/cards/category_cards/asset_cache_helper.dart	0.00% <0.00%> (ø)
...p/lib/cards/category_cards/raster_async_asset.dart	0.00% <0.00%> (ø)
...oth_app/lib/cards/category_cards/raster_cache.dart	0.00% <0.00%> (ø)
..._app/lib/cards/category_cards/svg_async_asset.dart	0.00% <0.00%> (ø)
...smooth_app/lib/cards/category_cards/svg_cache.dart	0.00% <0.00%> (ø)
...th_app/lib/cards/data_cards/image_upload_card.dart	0.00% <0.00%> (ø)
...es/smooth_app/lib/cards/data_cards/score_card.dart	4.54% <0.00%> (-0.22%)	⬇️
...t_cards/knowledge_panels/knowledge_panel_card.dart	0.00% <0.00%> (ø)
...knowledge_panels/knowledge_panel_element_card.dart	0.00% <0.00%> (ø)
... and 117 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e135c19...44b7539. Read the comment docs.

[teolemon]

e: /opt/hostedtoolcache/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt: (23, 1): Class 'QRView' is not abstract and does not implement abstract member public abstract fun onRequestPermissionsResult(p0: Int, p1: Array<(out) String!>, p2: IntArray): Boolean defined in io.flutter.plugin.common.PluginRegistry.RequestPermissionsResultListener
e: /opt/hostedtoolcache/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt: (216, 26): Null can not be a value of a non-null type String
e: /opt/hostedtoolcache/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt: (247, 26): Null can not be a value of a non-null type String
e: /opt/hostedtoolcache/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt: (310, 5): 'onRequestPermissionsResult' overrides nothing
e: /opt/hostedtoolcache/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRViewFactory.kt: (10, 1): Class 'QRViewFactory' is not abstract and does not implement abstract base class member public abstract fun create(p0: Context?, p1: Int, p2: Any?): PlatformView defined in io.flutter.plugin.platform.PlatformViewFactory
e: /opt/hostedtoolcache/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRViewFactory.kt: (13, 5): 'create' overrides nothing