Please allow typing while saving

[HT-7]

Please allow typing while the file is in the process of being saved. There is no benefit in disallowing typing while the file is in the process of being saved.

Saving a text file might seem trivial, but it is not instantaneous if, for example, an external hard drive needs to spin up before writing the file. This adds a latency of several seconds, which is annoying. One less annoyance is always progress, no matter how trivial it might appear to be.