Fix Hovertext for 1D

[itsdawei]

Description

Only shows hover text for x or y if the array is 1D (either height = 1 or width = 1).

Status

• [x] I have read the guidelines in CONTRIBUTING.md
• [x] I have formatted my code using yapf
• [x] I have linted my code with pylint
• [x] I have tested my code by running pytest
• [x] I have added a one-line description of my change to the changelog in HISTORY.md
• [x] This PR is ready to go