Macros uninstalled through EM are still displayed as installed in WYSIWYG macros picker

STEPS TO REPRODUCE

1. Edit a page with CKEditor
2. Click 'Insert' > 'Other Macros'
3. In Filter box, search for a macro that is not installed (and displayed in 'Not Installed' category), e.g. 'JW Player'
4. Click 'Install' (verify the macro is listed as installed in the picker afterwards)
5. Go to Administer Wiki > Extensions > Extensions and uninstall this macro
6. Edit again the page with CKEditor
7. Click 'Insert' > 'Other Macros'
8. In Filter box, search for the previously uninstalled macro

EXPECTED RESULTS

The macro is only displayed as 'Not installed' (one entry in the list).

ACTUAL RESULTS

In macros picker, there are now 2 entries for JW Player macro, one which appears to be installed and one displayed as 'Not installed'.

The issue that macros remain displayed on macros picker after uninstalled through EM reproduces on 14.3.1 and on 13.10.5 too.