increase artist/top and album/tracks listing

Handle .next entry

Solve arg-limit for curl. See https://github.com/yne/dzr/issues/46

add ARL support in VSCode

Add DZR_ARL warning/requirement

Use track .FALLBACK when available

Persist Player Volume in global config + fix track refresh (Fixes #43)

- To prevent undefined value of extracted cbc key at first run the conf() object is refreshed at every access
- To allow playback behind corporate proxies the 'secure' flag was added

Fix Share All button only shared focused tracks

The following url shall now be handled by dzr
You can triger them from `xdg-open my-url`

    vscode://yne.dzr/pause
    vscode://yne.dzr/play
    vscode://yne.dzr/load # load next track
    vscode://yne.dzr/load?[0] # load track at [0]
    vscode://yne.dzr/add?[[76533108,76533118]] # add 2 track by id (used by  "copy link" menu)