Fret marks almost unreadable in Tabs

GIT commit 6bf760c / Windows 7

1) Guitar Tablature template
2) Enter some notes (eg eighth notes)

- Expected result (except the reported bug for the beams start: #116101: Issue with the Start beam in Tab staves and this other for the beams offset: #118636: Tablature beam not drawing correctly in Full or Common Tablature staff)

- Current result: fret marks are very-very tiny, almost unreadable, despite the zoom value to 550% :)

Note: I observe this issue appears with this commit (yesterday): 4ac407d