skip fieldsList_e init if it already has fields

[mituritsyn]

Fix for small issue when "Disabled fields" list is stacked on each opening

[nerdCopter]

• i dont think this is the proper fix. if you open LOG A with no disabled fields, then open LOG B with some disabled fields, it simply keeps LOG A results.
• proper fix would be clear the results, then continue the normal process.

[mituritsyn]

• i dont think this is the proper fix. if you open LOG A with no disabled fields, then open LOG B with some disabled fields, it simply keeps LOG A results.
• proper fix would be clear the results, then continue the normal process.

thanks for the tip. with emptying the list there is no issues with different logs in one session

[sonarcloud]

Quality Gate passed

Issues
0 New issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[nerdCopter]

thank you both. committed @haslinghuis ' suggestion and approved.

[github-actions]

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