The hand cursor wrongly appears when long clicking the gray border while the player is minimized

[Softvision-CristinaBadescu]

[Affected versions]:

• Firefox 57.0.4 and up
• Min Vid v0.4.7

[Affected Platforms]:

• All Windows
• All Mac
• All Linux

[Prerequisites]:

• Have the latest Min Vid v0.4.7 (custom built 2018/01/16) installed on a new clean profile.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites and navigate to https://www.youtube.com.
2. Send a video to the Min Vid player by using the "Play now" option.
3. Click the "Minimize" button.
4. Click long the gray border (the area between the "Pause" button and Volume icon) and observe how the cursor is displayed.

[Expected result]:

• The cursor is displayed as an arrow.

[Actual result]:

• The cursor is displayed as a hand.

[Notes]:

• This issue is also reproducible with the latest Min Vid version installed from Test Pilot experiments page.
• Here is a screen recording of the issue: