Revert NWjs for Linux only

[haslinghuis]

Mike on Slack did report an issue:

After updating NWjs 0.54.1 to 0.60.0 it seems OSD elements can't be moved on Linux platform.
We need NWjs >= 0.59.x for Windows users so we can't simply revert to 0.54.1

So this is a temporary fix until we have a better solution.

See #2797 for more details

EDIT: With Node 16 it's working with NWjs 0.62 ( not with 0.60 ), but there is still a big area appearing while selecting and moving an element which can be resolved by disabling the line on 2355:

ev.dataTransfer.setDragImage($(this).data('field').preview_img, offsetX, offsetY);

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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[github-actions]

Do you want to test this code? Here you have an automated build:
Betaflight-Configurator-Debug-Android
Betaflight-Configurator-Debug-Linux
Betaflight-Configurator-Debug-macOS
Betaflight-Configurator-Debug-Windows
WARNING: It may be unstable and result in corrupted configurations or data loss. Use only for testing!

[blckmn]

AUTOMERGE: (FAIL)

• github identifies PR as mergeable -> FAIL
• assigned to a milestone -> PASS
• cooling off period lapsed -> PASS
• commit count less or equal to three -> PASS
• Don't merge label NOT found -> PASS
• at least one RN: label found -> PASS
• Tested label found -> FAIL
• assigned to an approver -> PASS
• approver count at least three -> FAIL

[mituritsyn]

Do you want to test this code? Here you have an automated build: Betaflight-Configurator-Debug-Android Betaflight-Configurator-Debug-Linux Betaflight-Configurator-Debug-macOS Betaflight-Configurator-Debug-Windows WARNING: It may be unstable and result in corrupted configurations or data loss. Use only for testing!

osd elements relocation works fine in portable version under Fedora OS

[schugabe]

I can also confirm that that PR fixes the issue on ubuntu

[limonspb]

@haslinghuis could you please point me what is going to happen if we rever it for Windows too?

[haslinghuis]

@limonspb please read the link in the opening of this PR.