TextWebView: allow to upload multiple attachements

[tobiasKaminsky]

• Tests written, or not not needed

[juliusknorr]

Since Stephan pinged me on this, cannot really judge on the code but Arthur gave it a test run and confirmed that it works

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/13546.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	59	59
Errors	3	3

SpotBugs

Category	Base	New
Bad practice	64	64
Correctness	63	63
Dodgy code	297	297
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	1	1
Multithreaded correctness	6	6
Performance	53	53
Security	18	18
Total	510	510

[alperozturk96]

When I try to open an .md file, the TextEditorWebView (which inherits from EditorWebView) gets called. I add multiple attachments to the .md file, they are added successfully, which triggers the else block without any issues.

[alperozturk96]

/backport to stable-3.30