Remove padding on ListViewItem inside a flyout - xaml

Question

I have the following flyout that i show when i press a button
<Flyout x:Name="saveDiscardMenu" Placement="Bottom" >
<Grid >
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<ListView Name="SaveDiscardList" ItemClick="SaveDiscardList_ItemClick" >
<ListViewItem Style="{StaticResource ListViewItemPDF}">
<TextBlock x:Uid="SaveChanges" Name="saveChanges" Grid.Row="0" Tapped="saveChanges_Tapped"></TextBlock>
</ListViewItem>
<ListViewItem Style="{StaticResource ListViewItemPDF}">
<TextBlock x:Uid="DiscardChanges" Name="discardChanges" Grid.Row="1" Margin="0,20,0,0" Tapped="discardChanges_Tapped" ></TextBlock>
</ListViewItem>
</ListView>
</Grid>
</Flyout>
it looks like this
and i use this as my ListViewItem style
<Style TargetType="ListViewItem" x:Key="ListViewItemPDF">
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}" />
<Setter Property="Background" Value="Transparent"/>
<Setter Property="TabNavigation" Value="Local"/>
<Setter Property="IsHoldingEnabled" Value="True"/>
<Setter Property="Margin" Value="0,0,0,0"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Stretch" />
<Setter Property="Padding" Value="0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<ListViewItemPresenter
ContentTransitions="{TemplateBinding ContentTransitions}"
Padding="{TemplateBinding Padding}"
SelectionCheckMarkVisualEnabled="True"
CheckHintBrush="{ThemeResource ListViewItemCheckHintThemeBrush}"
CheckSelectingBrush="{ThemeResource ListViewItemCheckSelectingThemeBrush}"
CheckBrush="{ThemeResource ListViewItemCheckThemeBrush}"
DragBackground="{ThemeResource ListViewItemDragBackgroundThemeBrush}"
DragForeground="{ThemeResource ListViewItemDragForegroundThemeBrush}"
FocusBorderBrush="{ThemeResource ListViewItemFocusBorderThemeBrush}"
PlaceholderBackground="{ThemeResource ListViewItemPlaceholderBackgroundThemeBrush}"
PointerOverBackground="{StaticResource MyLightBlue}"
SelectedBorderThickness="{ThemeResource ListViewItemCompactSelectedBorderThemeThickness}"
SelectedBackground="{ThemeResource ListViewItemSelectedBackgroundThemeBrush}"
SelectedForeground="{ThemeResource ListViewItemSelectedForegroundThemeBrush}"
SelectedPointerOverBackground="{ThemeResource ListViewItemSelectedPointerOverBackgroundThemeBrush}"
SelectedPointerOverBorderBrush="{ThemeResource ListViewItemSelectedPointerOverBorderThemeBrush}"
DisabledOpacity="{ThemeResource ListViewItemDisabledThemeOpacity}"
DragOpacity="{ThemeResource ListViewItemDragThemeOpacity}"
ReorderHintOffset="{ThemeResource ListViewItemReorderHintThemeOffset}"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
PointerOverBackgroundMargin="1"
ContentMargin="4" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
What i would like to know is how to remove the left and right padding each items appears to have, i've tried setting the margins and padding to 0 but it allways seem to have a space between the sides of the items and the edge of the flyout.

Answer 1

Since I just got poked for my bad habit of so many quickie answers in comments...
Looking at the structure of the default control style template for FlyoutPresenter we notice there's a padding bound to a resource of;
<Thickness x:Key="FlyoutContentThemePadding">12,11,12,12</Thickness>
Which is often the culprit when you notice your Flyout content getting a bit squished. While yes ListView and other ItemsControl variants generally have their own templated Paddings/Margins that can interfere, the more we embed something into additional templated controls, the more layers there are to sort through to find our culprit.
Glad it helped. :)

Answer 2

Try to override Margin and Padding in ItemContainerStyle:
<ListView>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="Margin" Value="0"/>
<Setter Property="Padding" Value="0"/>
<Setter Property="MinWidth" Value="0"/>
</Style>
</ListView.ItemContainerStyle>
</ListView>
Might be MinWidth and MinHeight will be required to set 0 as well.