New board name not cleared after creating or dismissing a new board

[theoholl]

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Describe the bug
The text entered in the text input for the name of a new board is saved even after dismissing the new board creation or after submitting it. The next time the Add board button is clicked, the same name appears again.

To Reproduce
Steps to reproduce the behavior:

1. Click on the Add board button in the left-side navigation
2. Enter some value into the text field
3. Confirm or cancel the board creation with the cross or check icon buttons
4. Click on Add board again
5. The previously entered value appears again

Expected behavior
The value for the text input should be cleared when creating or dismissing the new board creation. The placeholder text should be shown instead of the value entered before.

Screencast

Screencast.Bug.mp4