Fix: Prevent search bar from capturing Revit keyboard shortcut characters

Changed the initial focused element of FrmAddInManager from the search TextBox (tbxSearch) to the TabControl. This prevents the second character of a two-letter Revit keyboard shortcut (like 'AA') from being entered into the search field when the window opens.

Fixes #76

Co-authored-by: chuongmep <31106432+chuongmep@users.noreply.github.com>

Author: google-labs-jules[bot]

AddInManager/View/FrmAddInManager.xaml

@@ -17,7 +17,7 @@
     d:DesignHeight="600"
     d:DesignWidth="400"
     Closed="OnCloseApp"
-    FocusManager.FocusedElement="{Binding ElementName=tbxSearch}"
+    FocusManager.FocusedElement="{Binding ElementName=TabControl}"
     Icon="../Resources/dev.ico"
     Left="{model:SettingBinding AppLeft}"
     PreviewKeyDown="CloseFormEvent"