Cancel font download fails

[openscript]

Device

X4

Affected Version

v1.4.0-rc-2

Build Variant

tiny

EPUB Optimization

No / Not Applicable

Cache State

No / Not Applicable

Describe the Bug

Cancel button while font downloading (downloading all fonts) doesn't work

Steps to Reproduce

1. Settings
2. Font browser
3. Download all fonts
4. Cancel

Expected Behavior

Download is canceled.

Relevant Log Output/Screenshots