Update cycle counter code to run periodically while still not being in the way of editing

[themkat]

The first experiments in periodic reload led to the editing experience not feeling as great. That is why I let it be static for now. It can easily be reloaded by reactivating the minor mode though.

A solution might include:

• Small changes in presentation to not be in the way of editing
• Using a timer to update the overlays, and making sure it is cleaned up properly.
• Make sure it does NOT affect other modes and buffers while Emacs is open.
• Make sure the editing experience does not get affected too much by the periodic updates, and that the editing experience feels harmonious. No stuttering or too much "random" movement of editing cursor.