Fixed icon for tiled.exe

Fixing the path as in 358b6a2 was not enough, because
the icon had already broken in 16229d0.

It appears the texttemplate module properties were ineffective in the
Group item, but it failed to generate an error.

src/tiledapp/tiledapp.qbs

@@ -11,7 +11,7 @@ TiledQtGuiApplication {
     Depends { name: "libtilededitor" }
     Depends { name: "ib"; condition: qbs.targetOS.contains("macos") }
     Depends { name: "Qt.gui-private"; condition: qbs.targetOS.contains("windows") && Qt.core.versionMajor >= 6 }
-    Depends { name: "texttemplate" }
+    Depends { name: "texttemplate"; condition: qbs.targetOS.contains("windows") }
 
     property bool qtcRunnable: true
 
@@ -47,6 +47,22 @@ TiledQtGuiApplication {
         targetName: "Tiled"
     }
 
+    Properties {
+        condition: qbs.targetOS.contains("windows")
+
+        texttemplate.outputTag: "rc"
+        texttemplate.dict: {
+            var versionArray = project.version.split(".");
+            if (versionArray.length == 3)
+                versionArray.push("0");
+
+            return {
+                version: project.version,
+                version_csv: versionArray.join(",")
+            };
+        }
+    }
+
     Group {
         condition: qbs.targetOS.contains("macos")
         name: "Public DSA Key File"
@@ -175,17 +191,5 @@ TiledQtGuiApplication {
         name: "RC file (Windows)"
         condition: qbs.targetOS.contains("windows")
         files: [ "tiled.rc.in" ]
-
-        texttemplate.outputTag: "rc"
-        texttemplate.dict: {
-            var versionArray = project.version.split(".");
-            if (versionArray.length == 3)
-                versionArray.push("0");
-
-            return {
-                version: project.version,
-                version_csv: versionArray.join(",")
-            };
-        }
     }
 }