Issue 279 remove unnecessary unwraps

[naomijub]

Partially Addresses #279

[codecov]

Codecov Report

Attention: Patch coverage is 19.71831% with 114 lines in your changes are missing coverage. Please review.

Project coverage is 37.70%. Comparing base (b31471b) to head (462e7b8).

Files	Patch %	Lines
crates/prefab/src/save.rs	37.50%	20 Missing ⚠️
crates/editor_ui/src/camera_view.rs	0.00%	16 Missing ⚠️
crates/editor_core/src/load.rs	0.00%	14 Missing ⚠️
crates/editor_core/src/gltf_unpack.rs	0.00%	13 Missing ⚠️
crates/editor_tabs/src/lib.rs	0.00%	10 Missing ⚠️
crates/editor_ui/src/inspector/mod.rs	0.00%	7 Missing ⚠️
crates/prefab/src/sub_scene/mod.rs	12.50%	7 Missing ⚠️
crates/editor_tabs/src/start_layout.rs	0.00%	6 Missing ⚠️
crates/editor_ui/src/settings.rs	0.00%	6 Missing ⚠️
crates/prefab/src/editor_registry/mod.rs	60.00%	6 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             v0.6     #292      +/-   ##
==========================================
- Coverage   37.98%   37.70%   -0.28%     
==========================================
  Files          69       69              
  Lines        9743     9812      +69     
==========================================
- Hits         3701     3700       -1     
- Misses       6042     6112      +70     

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