[FEATURE REQUEST] Apply (1) to uploads' name conflicts

[jesmrec]

From #3946

When new files are

• Uploaded manually to oC
• Shared from a 3rd party app
• Text shared with oC

and a name conflict happens, (2) is added to the file name instead of (1) as was fixed in the issue above.

Same criteria should be apply to all conflicting scenarios.

TASKS

• Research (if needed)
• Create branch feature/feature_name
• Development tasks
  • Implement whatever
  • ...
• Code review and apply changes requested
• Design test plan
• QA
• Merge branch feature/feature_name into master

PR

• App
• Library (if needed)