style: use fixed tab title font size; NumericUpDown border

Author: love-linger

src/SourceGit/Views/Launcher.axaml

@@ -173,13 +173,15 @@
                             IsHitTestVisible="False"/>
                       <TextBlock Grid.Column="1"
                                  Classes="monospace"
+                                 FontSize="12"
                                  HorizontalAlignment="Stretch" VerticalAlignment="Center"
                                  TextAlignment="Center"
                                  Text="{Binding Node.Name}"
                                  IsVisible="{Binding Node.IsRepository}"
                                  IsHitTestVisible="False"/>
                       <TextBlock Grid.Column="1"
                                  Classes="monospace"
+                                 FontSize="12"
                                  HorizontalAlignment="Stretch" VerticalAlignment="Center"
                                  TextAlignment="Center"
                                  Text="{DynamicResource Text.PageTabBar.Welcome.Title}"

src/SourceGit/Views/Preference.axaml

@@ -158,6 +158,7 @@
                            Minimum="10" Maximum="16" Increment="0.5"
                            Height="28"
                            Padding="4"
+                           BorderThickness="1" BorderBrush="{DynamicResource Brush.Border1}"
                            CornerRadius="3"
                            Value="{Binding DefaultFontSize, Mode=TwoWay}">
               <NumericUpDown.Styles>