fix: make sure popup won't close when clicking on elements.

src/Ursa.Themes.Semi/Controls/TimeRangePicker.axaml

@@ -25,7 +25,7 @@
                             BorderBrush="{TemplateBinding BorderBrush}"
                             BorderThickness="{TemplateBinding BorderThickness}"
                             CornerRadius="{TemplateBinding CornerRadius}" />
-                        <Grid ColumnDefinitions="*, Auto, * Auto">
+                        <Grid ColumnDefinitions="*, Auto, * Auto" Name="PART_Grid">
                             <TextBox
                                 Name="{x:Static u:TimeRangePicker.PART_StartTextBox}"
                                 Grid.Column="0"
@@ -75,6 +75,8 @@
                         <Popup
                             Name="{x:Static iri:PartNames.PART_Popup}"
                             IsLightDismissEnabled="True"
+                            OverlayDismissEventPassThrough="True"
+                            OverlayInputPassThroughElement="{Binding ElementName=PART_Grid}"
                             IsOpen="{TemplateBinding IsDropdownOpen,
                                                      Mode=TwoWay}"
                             Placement="BottomEdgeAlignedLeft"