Remove whitespace at the end of a line

[Yxnt]

Describe your changes

In the management url textbox in the settings page of the client ui, if a space is added to the end of the input, then the connection fails (when the user enters a blank character at the end, he/she may not realize that he/she is entering a blank character), does this need to be done to deal with blank characters.

Checklist

• [ ] Is it a bug fix
• [ ] Is a typo/documentation fix
• [x] Is a feature enhancement
• [ ] It is a refactor
• [ ] Created tests that fail without the change (if possible)
• [ ] Extended the README / documentation, if necessary

[CLAassistant]

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