Replace PNG icons with SVG for future Redmine compatibility #128
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Background / Purpose
Redmine switched to SVG icons in version 6.0.
Although PNG icons and related CSS styles have been kept for backward compatibility with plugins and themes in version 6.1, they might be removed in the future. Therefore, I think it would be better to migrate to SVG icons in the near future.
In fact, support for PNG icons was removed in trunk with r24029.
While it’s unclear whether this change will remain in Redmine 7.0, PNG icon support might be removed in the near future.
Details
This pull request replaces PNG icons used in this plugin with SVG icons.
Screenshots
Redmine 5.1
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Redmine 6.0
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Redmnine 6.1
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trunk (r24062)
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