UI: use system generated document icon on macOS

Adds Document Type Identifier configuration to use a system generated
document icon for Blender files on macOS. The system composites the
app’s icon and the extension name onto the document sheet icon
(new style on macOS 11 Big Sur and old style on macOS 10.15 Catalina
and earlier). This is in line with Apple’s Human Interface Guidelines.

Removes the previously used file icon because it is no longer needed.

Differential Revision: https://developer.blender.org/D10267

release/darwin/Blender.app/Contents/Info.plist

@@ -11,8 +11,6 @@
 			<array>
 				<string>blend</string>
 			</array>
-			<key>CFBundleTypeIconFile</key>
-			<string>blender file icon.icns</string>
 			<key>CFBundleTypeName</key>
 			<string>Blender File</string>
 			<key>CFBundleTypeOSTypes</key>
@@ -23,6 +21,12 @@
 			<string>Editor</string>
 			<key>LSIsAppleDefaultForType</key>
 			<true/>
+			<key>LSItemContentTypes</key>
+			<array>
+				<string>org.blenderfoundation.blender.file</string>
+			</array>
+			<key>CFBundleTypeIconSystemGenerated</key>
+			<true/>
 		</dict>
 	</array>
 	<key>CFBundleExecutable</key>
@@ -49,5 +53,30 @@
 	<string>NSApplication</string>
 	<key>NSHighResolutionCapable</key>
 	<true/>
+	<key>UTExportedTypeDeclarations</key>
+	<array>
+		<dict>
+			<key>UTTypeConformsTo</key>
+			<array>
+				<string>public.data</string>
+			</array>
+			<key>UTTypeIdentifier</key>
+			<string>org.blenderfoundation.blender.file</string>
+			<key>UTTypeIcons</key>
+			<dict>
+				<key>UTTypeIconName</key>
+				<string>Blender File</string>
+				<key>UTTypeIconText</key>
+				<string>blend</string>
+			</dict>
+			<key>UTTypeTagSpecification</key>
+			<dict>
+				<key>public.filename-extension</key>
+				<array>
+					<string>blend</string>
+				</array>
+			</dict>
+		</dict>
+	</array>
 </dict>
 </plist>