[SmartHint] Hint placement for "readonly" controls (#3764)
* Demo app workaround/hack for initial miscalculation of hint placement
* Ensure ComboBox smart hint behaves according to MD spec
According to the "Behavior" section of the "Menus" page in the link below, the hint should float even when there is no selection, but the popup is open.
https://m2.material.io/components/menus#exposed-dropdown-menu
* Fix hint positioning issue when "readonly" element
The issue was present for all controls once they are in "readonly" state. Special handling of the case where the element is readonly, and the hint should follow the prefix/suffix needed to be added because of the "business rule" that prefix/suffix is always visible when the element is "readonly".
* Fixing so the hack is no longer needed
* Fix AutoSuggestBox as well
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Co-authored-by: Kevin Bost <kitokeboo@gmail.com>

Bumping version numbers
Now the colors and mahapps libs will all be the same version

Bumping version for release

Grammatical fixes to App.xaml (#3468)
Reformatted comment lines to adhere to correct English grammar:
- Included some colons 
- Changed 'setup' (a noun) to 'set up' (a verb)
- 'built-in' is hyphenated
- 'as well' is not needed when existing sentence has the word 'also'

Add IsSynchronizedWithCurrentItem to MaterialDesignDataGridComboBox (#…
…3222)

Adding version check
Updating versions.

Fix PasswordBox keyboard focus traversal issue (#3096)
* Extend SmartHint demo page with new features
* Handle forward/backward keyboard focus on reveal style PasswordBox
* Add UI test to verify tabbing works
* Fix issue with backwards focus traversal when hiding a revealed password
* Update UI test with syntax feature which is hopefully added to XAMLTest
* Rev'ing XAMLTest
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Co-authored-by: Kevin Bost <kitokeboo@gmail.com>

Fixing needs

Add option for custom popup placement for ComboBox (#3005)
* Add special ComboBox popup handling for 90 degrees rotation
Popup placement was wrong in case a LayoutTransform was applied to rotate the ComboBox. The default WPF ComboBox does respect this, and thus so should MDIX.
To RotateTransfrom.Angle is compared against values of 90 and -90 (10 digit precision) to determine whether this is a rotation where the special handling should be applied.
* Refactor custom popup placement into publicly exposed callback
Rather than handling arbitrary rotations in the library itself, we expose a callback which can then be used to rotate the popup shown by the combobox such that it matches the users needs.
* Update MaterialDesignThemes.Wpf/ComboBoxPopup.cs
Co-authored-by: Kevin B <Keboo@users.noreply.github.com>
* Fix compile error
Co-authored-by: Kevin B <Keboo@users.noreply.github.com>

Updating release process