mouse_up event not fireing

MC Version: 1.16
CC Version: v1.19.2

The mouse_up event is not emitted.

Steps to reproduce:
```
lua
while true do print(os.pullEvent()) end
```
Click, and notice no mouse_up events.

Seems like https://github.com/Zundrel/cc-tweaked-fabric/blob/46bc42d5a72efde679dec2837cc7245a75ee79b8/src/main/java/dan200/computercraft/client/gui/widgets/WidgetTerminal.java#L82 is never called.