Toolbar flickers on image change

[Setsu-BHMT]

System information:

• Windows OS version: 10.0.19044 Build 19044
• ImageGlass version: 8.6.7.13 x64 (BTW it would be helpful if the version string in the Help dialog is copy-able)

To Reproduce

Steps to reproduce the behavior:

1. Open an image to view
2. Press arrow keys to switch to next image

Actual behavior:

The top toolbar will flicker due to re-painting.

Expected behavior:

The top toolbar should be cached and not re-painted, since none of the options should change when switching images.

Screenshots:

N/A due to the flicker lasting only a few milliseconds.

Additional context:

Very minor issue I admit, but since images are shown on a black background any sort of flickering becomes very noticeable.

[d2phap]

This is because the app state is set to busy while it's loading / saving / processing image. This will be fixed in version 9.0

[d2phap]

This issue was fixed in ImageGlass 9.0 beta