Change button text alignment to left

[JammingBen]

Description

We've changed the text alignment of buttons to left. We could make it configurable in the future, but for now I don't see a situation where we want to have the text centered.

Related Issue

• Fixes https://github.com/owncloud/web/issues/7619

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Technical debt
• [ ] Tests

[sonarcloud[bot]]

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0 Bugs
0 Vulnerabilities
0 Security Hotspots
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