Sidecar window slider gets stuck in 'slide' mode #1513
Describe the bug
Adjusting the middle vertical slider can make Emulator stuck in the slide mode, and the mouse can't escape from unintentionally adjusting the slider.
Steps to reproduce the behavior:
Slider should be released after user lets go of the slider.
This is due to the upgrade to Electron 4 which uses a different version of Chromium in which the architecture of webviews (which house the inspectors) has changed. Now the webviews eat all mouse events and they do not bubble up back to the slider component.
This causes the slider to calculate an incorrect delta when dragging the mouse over the inspector.