Bearer Token value still left even after being cleared

[reefqi037]

Describe the bug
Clear all button and Clear button in Authentication section won't clear the value of Bearer Token. Selecting Bearer Token Authentication Type after clicking clear button will show the old value.

To Reproduce
Steps to reproduce the behavior:

1. Select Bearer Token for Authentication Type
2. Add token value
3. Click Clear button or Clear all
4. Select Bearer Token for Authentication Type again
5. The old token will still be there

Expected behavior
Clicking Clear all or Clear button in Authentication section will clear the old token value.

Screenshots

[reefqi037]

Working on this. Just a simple fix.