A solution for the size issues

src/Tools/tim_tool/ui/app-window.slint

@@ -3,21 +3,26 @@ import { FileTab } from "./file-tab.slint";
 import { TabWidget } from "std-widgets.slint";
 
 export component MainWindow inherits Window {
-    min-width:  vram_tab.width;
-    min-height: vram_tab.height;
+    min-width:  tab_widget.width;
+    min-height: tab_widget.height;
+
+    tab_widget := TabWidget {
+        x: 0px;
+        y: 0px;
+        width: tab.width;
+        height: tab.height;
 
-    TabWidget {
         current-index: 1;
-        file_tab := Tab {
-            title: "File Bah" + root.min-width/1px;
+        Tab {
+            title: "File Bah";
             FileTab {
                 x: 0px;
                 y: 0px;
             }
         }
-        vram_tab := Tab {
+        test := Tab {
             title: "VRAM Layout";
-            MainTab {
+            tab := MainTab {
                 x: 0px;
                 y: 0px;
             }