Change name of QS Cloud screen shots stored to disk after screenshot

[mountaindude]

Today file name is ${imgDir}/cloud/${appId}/thumbnail-${iSheetNum}-blurred.png

If copying a screenshot file there isn't any app ID in the file name (only in the path).
For QSEoW the app ID is included in the file name itself, make QS Cloud work the same way:

${imgDir}/cloud/${appId}/thumbnail-${appId}-${iSheetNum}-blurred.png

[mountaindude]

Released as part of 3.7.0