Don't render bounding box for multi-point lines during creation (#799)

* don't render bounding box for multi-point lines during creation

* force LayerUI rerender after creating a new point

Force LayerUI rerender after creating a new point so that the mobile UI
updates and the Done button is visible.

* don't select multiElement on confirm is locked

Co-authored-by: David Luzar <luzar.david@gmail.com>

src/actions/actionFinalize.tsx

@@ -27,6 +27,9 @@ export const actionFinalize: Action = {
         newElements = newElements.slice(0, -1);
       }
       appState.multiElement.shape = null;
+      if (!appState.elementLocked) {
+        appState.multiElement.isSelected = true;
+      }
     }
     if (!appState.elementLocked || !appState.multiElement) {
       resetCursor();