update menu.current before calling menu.keypress

[matthias314]

I think it makes sense that menu.current points to the current menu item when the user-defined keypress function is called for a TreeMenu. Currently this is not the case unless the key is space. In this case the current menu item is needed to process the key press correctly, and user-defined keypress functions will often be in the same situation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (86789ee) to head (3d7dff8).

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #18   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines          156       153    -3     
=========================================
- Hits           156       153    -3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[matthias314]

I've added a second commit that likewise updates menu.pagesize after calling menu.keypress because that function may modify the menu.