Backport fixes for DarkBetter theme icons

[jevenski]

This is a backport of typo fixes from this pull request: #2821

[stickz]

@jevenski Are any of these items removed still used in v5.1? I just need to confirm before merging this.

[jevenski]

Only duplicated icon links were removed and a typo was fixed in this PR. No extra items removed.

[stickz]

Great thanks! Can this fix be backported to branch v4.3 super stable as well?

[jevenski]

Great thanks! Can this fix be backported to branch v4.3 super stable as well?

@stickz I think this patch can be directly cherry-picked onto v4.3 branch without conflict. This part hasn't been modified yet since v4.3. If a pull request is in need, I can file one later.

[stickz]

Great thanks! Can this fix be backported to branch v4.3 super stable as well?

@stickz I think this patch can be directly cherry-picked onto v4.3 branch without conflict. This part hasn't been modified yet since v4.3. If a pull request is in need, I can file one later.

Cherry picked! Thanks for the heads up!