NumericField: Fix not updating value from text on blur when debounced

[rogue6800]

Description

Fixes #3651 - Numeric field with debounce interval doesn't apply change when the field loses focus.

Update the value before updating the text formatting on losing focus (on blur) of debounced numeric fields.

How Has This Been Tested?

Unit tests all pass. Also tested via demo in docs.

Checklist:

✔️ The PR is submitted to the correct branch (dev).
✔️ My code follows the code style of this project.
❌ I've added relevant tests.

• No Tests Added

[codecov]

Codecov Report

Merging #3653 (8051c95) into dev (4677eec) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev    #3653      +/-   ##
==========================================
+ Coverage   90.37%   90.38%   +0.01%     
==========================================
  Files         333      333              
  Lines       10487    10488       +1     
==========================================
+ Hits         9478     9480       +2     
+ Misses       1009     1008       -1     

Impacted Files	Coverage Δ
...r/Components/NumericField/MudNumericField.razor.cs	97.35% <100.00%> (+0.01%)	⬆️
...udBlazor/Services/KeyInterceptor/KeyInterceptor.cs	74.19% <0.00%> (ø)
...rc/MudBlazor/Components/Input/MudDebouncedInput.cs	89.58% <0.00%> (+2.08%)	⬆️

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[mikes-gh]

Look good to me @henon?