Some more fixes

[ricewind012]

Describe the PR Rounding fixes and add warning icon to the sanitize history dialog

PR Type

• [x] Add: Add feature or enhanced.
• [x] Fix: Bug fix or change default values.
• [ ] Clean: Refactoring.
• [ ] Doc: Update docs.

Related Issue Fixes #621, fixes #632, fixes #636, fixes #637, fixes #638, fixes #639

[black7375]

Thanks to your contribution, I was able to spend time first for more important bugs and new features.