also allow one column in app settings

Author: lublak

client/packages/lowcoder/src/comps/comps/appSettingsComp.tsx

@@ -216,7 +216,7 @@ const childrenMap = {
   disableCollision: valueComp<boolean>(false),
   lowcoderCompVersion: withDefault(StringControl, 'latest'),
   maxWidth: dropdownInputSimpleControl(OPTIONS, USER_DEFINE, "1920"),
-  gridColumns: RangeControl.closed(8, 48, 24),
+  gridColumns: RangeControl.closed(1, 48, 24),
   gridRowHeight: RangeControl.closed(4, 100, 8),
   gridRowCount: withDefault(NumberControl, DEFAULT_ROW_COUNT),
   gridPaddingX: withDefault(NumberControl, 20),