Fix #371 - Add portal name to page title

[kbeaugrand]

Description

What's new?

• Fix Task: Add Custom Site Title + Header (in the browser title) #371

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Tests
• Other

[codecov]

Codecov Report

Merging #472 (2d4c5c3) into main (b03b7df) will increase coverage by 0.08%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main     #472      +/-   ##
==========================================
+ Coverage   60.00%   60.08%   +0.08%     
==========================================
  Files         114      114              
  Lines        3690     3685       -5     
==========================================
  Hits         2214     2214              
+ Misses       1476     1471       -5     

Impacted Files	Coverage Δ
.../AzureIoTHub.Portal/Client/Shared/MainLayout.razor	0.00% <0.00%> (ø)
src/AzureIoTHub.Portal/Server/ConfigHandler.cs	0.00% <ø> (ø)
...rtal/Server/Controllers/v1.0/SettingsController.cs	100.00% <100.00%> (ø)

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