Added the HorizontalIconAlignment property to the button.

[m0lDaViA]

Added the HorizontalIconAlignment property to the button. You can now choose, if you want to show the icon left or right to the content.

Pull request type

Please check the type of change your PR introduces:

• [x] Update
• [x] Bugfix
• [x] Feature
• [ ] Code style update (formatting, renaming)
• [x] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [x] Documentation content changes

What is the current behavior?

Issue Number: N/A

What is the new behavior?

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