Fixes for appimage installs

ShellDemo/Resources/AppIcon/appicon.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="456" height="456" viewBox="0 0 456 456" xmlns="http://www.w3.org/2000/svg">
+  <rect width="456" height="456" fill="#1B79C4"/>
+</svg>

ShellDemo/Resources/AppIcon/appicon_combined.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="256" height="256" viewBox="0 0 256 256" xmlns="http://www.w3.org/2000/svg">
+  <rect width="256" height="256" rx="48" fill="#1B79C4"/>
+  <g transform="translate(48, 48) scale(6.67)">
+    <path fill="white" d="M3 13h8V3H3v10zm0 8h8v-6H3v6zm10 0h8V11h-8v10zm0-18v6h8V3h-8z"/>
+  </g>
+</svg>

ShellDemo/Resources/AppIcon/appiconfg.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="456" height="456" viewBox="0 0 456 456" xmlns="http://www.w3.org/2000/svg">
+  <!-- Dashboard icon (Material Icons) -->
+  <g transform="translate(88, 88) scale(11.67)">
+    <path fill="#000000" d="M3 13h8V3H3v10zm0 8h8v-6H3v6zm10 0h8V11h-8v10zm0-18v6h8V3h-8z"/>
+  </g>
+</svg>

ShellDemo/ShellDemo.csproj

@@ -38,7 +38,12 @@
     <MauiXaml Update="**/*.xaml" />
   </ItemGroup>
 
-  <!-- Embedded Resources (icons) -->
+  <!-- App Icon -->
+  <ItemGroup>
+    <MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#FFFFFF" BackgroundColor="#1B79C4" />
+  </ItemGroup>
+
+  <!-- Embedded Resources (images) -->
   <ItemGroup>
     <EmbeddedResource Include="Resources\Images\*.svg" />
     <EmbeddedResource Include="Resources\Images\*.png" />