Fix Powerpoint: reportSuperscriptAndSubscript error (PR #11095)
In the Powerpoint appModule, the incorrect config key was used. Looking up reportSuperscriptAndSubscript (instead of the correct reportSuperscriptsAndSubscripts) resulted in an error, making certain functions unusable.
Config option introduced in: "Separate the reporting of superscripts and subscripts from the report font attributes setting #10919"
Regression introduced with: #10932
Fixes #11094.
