Allow to select either Onlyoffice or Collabora if both suites are installed on the Nextcloud server #5729

Expected behaviour

In the context menu, an option to select "Open with Collabora" and "Open with Onlyoffice" should show up if both office suites are installed on the Nextcloud server. This is more consistent with the web interface of Nextcloud.

Actual behaviour

Currently ODT is opened with Collabora and DOCX gets opened with Onlyoffice. Onlyoffice only allows viewing of the document because of the removal of editing features in their Open Source version.

Steps to reproduce

Open ODT or DOCX file or other supported document types.

Reasoning or why should it be changed/implemented?

If both Collabora and Onlyoffice are installed on the Nextcloud server, the user should have the ability to select which office suite they want to open documents with. This is more consistent with the web interface of Nextcloud where either option can be selected.

iOS version

iOS 13.3.1

App version

2.25.9.2

Server configuration

Operating system: Ubuntu 18.04

Web server: Apache 2.4

Database: Mysql 5.7

PHP version: 7.2

Nextcloud version: 18.0.3

No source file or test is named. Start by reproducing the context-menu flow for ODT, DOCX, and other supported document types with both Collabora and OnlyOffice installed; trace how the selected suite is launched. Done means the menu offers both suites and opens the document with the suite the user selects.