Add position indicator for reading the current org document

[k4r4b3y]

I use orgro a lot for reading the offline copies of online blog posts I store using org-web-tools emacs package. Naturally, these result in long org files, and while reading in dark mode in orgro, I do not see any indication of my current position with respect to the current org file's length. A visual indicator at the bottom most (or whereever better) of the screen, like a loading screen progressing from left to right would be quite an ergonomic addition to orgro. For an example of visual indicator I have in mind, see this link: https://www.wheresyoured.at/costs/. The article includes a red bar above that gets filled from left to right as you scroll down the current page.

[amake]

I find those top-border progress-bar-looking things to be distracting. I would prefer to simply have a normal scrollbar (in fact I was surprised to find that there wasn't one).

Unfortunately, I found that simply adding one resulted in a poor experience:

orgro-scrollbar-glitches-720p-small.mp4

I guess there must be an issue measuring the height of the document. I'm not sure if it's my bug or Flutter's, and if it can be fixed at all with the current architecture.

Alternate position indicators will surely suffer from the same issue, so until the cause is determined I think this feature request will be stuck.

[k4r4b3y]

I find those top-border progress-bar-looking things to be distracting. I would prefer to simply have a normal scrollbar

Both are fine by me. I just want a visual indicator about my position in the file.

until the cause is determined I think this feature request will be stuck.

Alright.