Warn when storage becomes unavailable

[jsosulski]

Current behavior

Similar to https://github.com/BoostIO/Boostnote/issues/3072, but with a running instance of BoostNote.

When a storage location becomes unavailable while BoostNote is running, the user does not receive any notification whatsoever.

1. Your are able to edit notes, however, changes will not be saved to disk!

2. BoostNote does nothing when trying to create a new note.

Expected behavior

1. A popup or some status icon warns the user that changes to notes are not stored to disk.
2. A notitification that tells you why creation of the note failed.

Steps to reproduce

1. Create storage location on removable media, add a folder and some random note.
2. Remove media while BoostNote is running.
3. Try to edit a note in said storage location / try to create a new note in said storage location.

Environment

• Version : 0.17.11
• OS Version and name : Ubuntu 18.04

[rvbcldud]

Relatively new to contributing to open source but I believe I have an improvement to the current scenario Any input would be greatly appreciated :)

Code Added

window.alert('Boostnote disk not found, try reconnecting disk')

• This is the code I added which will have the behavior shown in the screenshots following
• Added on line 24 of /Boostnote/browser/lib/dataApi/resolveStorageData.js

Screenshots

2 Cases

1. When adding to disconnected boostnote directory
2. When attempting to create a new note