Fix/disable spaces, 2nd try

customisations.json

@@ -2,5 +2,6 @@
   "src/@types/tchap.ts": "src/@types/tchap.ts",
   "src/components/views/dialogs/CreateRoomDialog.tsx": "src/components/views/dialogs/TchapCreateRoomDialog.tsx",
   "src/components/views/elements/TchapRoomTypeSelector.tsx": "src/components/views/elements/TchapRoomTypeSelector.tsx",
-  "src/components/views/dialogs/ServerPickerDialog.tsx": "src/components/views/dialogs/TchapServerPickerDialog.tsx"
+  "src/components/views/dialogs/ServerPickerDialog.tsx": "src/components/views/dialogs/TchapServerPickerDialog.tsx",
+  "src/customisations/ComponentVisibility.ts": "src/customisations/TchapComponentVisibility.ts"
 }

src/customisations/TchapComponentVisibility.ts

@@ -0,0 +1,45 @@
+/*
+Copyright 2022 - DINUM - MIT license
+
+File copied from ComponentVisibility.ts in matrix-react-sdk v3.46.0
+*/
+
+// Dev note: this customisation point is heavily inspired by UIFeature flags, though
+// with an intention of being used for more complex switching on whether or not a feature
+// should be shown.
+
+// Populate this class with the details of your customisations when copying it.
+
+import { UIComponent } from "matrix-react-sdk/src/settings/UIFeature";
+
+/**
+ * Determines whether or not the active MatrixClient user should be able to use
+ * the given UI component. If shown, the user might still not be able to use the
+ * component depending on their contextual permissions. For example, invite options
+ * might be shown to the user but they won't have permission to invite users to
+ * the current room: the button will appear disabled.
+ * @param {UIComponent} component The component to check visibility for.
+ * @returns {boolean} True (default) if the user is able to see the component, false
+ * otherwise.
+ */
+function shouldShowComponent(component: UIComponent): boolean {
+    if (component === UIComponent.CreateSpaces) {
+        return false;
+    }
+    return true; // default to visible
+}
+
+// This interface summarises all available customisation points and also marks
+// them all as optional. This allows customisers to only define and export the
+// customisations they need while still maintaining type safety.
+export interface IComponentVisibilityCustomisations {
+    shouldShowComponent?: typeof shouldShowComponent;
+}
+
+// A real customisation module will define and export one or more of the
+// customisation points that make up the interface above.
+export const ComponentVisibilityCustomisations: IComponentVisibilityCustomisations = {
+    // while we don't specify the functions here, their defaults are described
+    // in their pseudo-implementations above.
+    shouldShowComponent,
+};