[IDE][Proposal] Inconsistent info on bottom status bar

Status bar of the Arduino IDE (1.8.10) shows the last initiated action, where it would be more informative to show the currently ongoing state of the IDE.
Example:
- Start a verify action -> IDE status bar message "Compiling sketch..."
- Start a save action (while verify still ongoing) -> IDE status bar message switches to "Done saving", and there's no notification that compiling is still ongoing. It's confusing.

Reproduce the sequence in the Arduino IDE: start verification, then start saving while compilation is still running, and observe the status bar. Trace how these actions update the status message; done means the ongoing compilation state remains visible instead of being replaced by "Done saving".

Written by the indexing model from the issue text.