Use space instead of 0 for padding hi-scores in songs screen. Fixes #1091

[soonick]

What does this PR do?

Fixes #1091

Closes Issue(s)

#1091

Motivation

Issue #1091

[soonick]

@Lord-Kamina , this change was introduced in your commit that addressed uses of ostringsream (https://github.com/performous/performous/commit/bbdff4c5dab9c7718cee4966ac7cf73f8808d362), I'm not sure if the UI change was intentional or an accident

[github-actions[bot]]

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