[Bug Report] Flickering Cursor in Files with 1000+ Lines
@fox0430

When working on #1553, I edited some files with more than one thousand lines.  With the setting `disableChangeCursor = false` in my settings for Moe, the cursor stays solid (i.e. non-blinking) during the editing process.  I know that due to the debug symbols in test compilations, the cursor will always flicker when moving around in the file because the debug compilation is less performant in comparison to the release build.

But if even the release build starts to have a flickering cursor when editing large files, this might indicate that there could be a performance bottle neck somewhere.

I edited the following files:

- src/moepkg/color.nim (flickers only in EX mode)
- src/moepkg/settings.nim (always flickering)