Windows code signing improvements

This improvement is only included in fbs Pro.

This release makes fbs sign on Windows more robust with respect to flakiness in the underlying invocation of Microsoft's signtool. It also adds a new setting windows_sign_server that can be used to configure the timestamp server used for signing.

Specifically, this release makes errors of the following form less likely:

SignTool Error: The specified timestamp server either could not be reached or returned an invalid response.
SignTool Error: An error occurred while attempting to sign: C:\....

Fix buildvm for Pro users without multiple downloads

This improvement is only included in fbs Pro.

fbs Pro users had no easy way to install fbs Pro in buildvm virtual machines. This release fixes this: You can now add fbs_pro.tar.gz into requirements/ and add fbs_pro.tar.gz to requirements/base.txt to have it installed in the VM.

Fix buildvm

This improvement is only included in fbs Pro.

Commands such as fbs buildvm ubuntu were plagued by several problems due to outdated Python and OS versions. This release fixes this.

Fix `buildvm fedora` for newer Python versions

Specifially, building for Python 3.9.7 gave:

/root/.pyenv/plugins/python-build/bin/python-build: line 1730: patch: command not found
BUILD FAILED (Fedora 25 using python-build 20180424)

Thank you @meramsey for the PR!

Fix warning during installation

This improvement is only included in fbs Pro.

The following warning was shown when installing fbs:

DEPRECATION: fbs is being installed using the legacy 'setup.py install'
method, because it does not have a 'pyproject.toml' and the 'wheel' package
is not installed. pip 23.1 will enforce this behaviour change. A possible
replacement is to enable the '--use-pep517' option. Discussion can be found
at https://github.com/pypa/pip/issues/8559".

This release fixes this.

Fix `fbs startproject` in some cases

This improvement is only included in fbs Pro.

The following error occurred when you had multiple Qt bindings (eg. PyQt5 and PySide6) installed, but not PyQt6:

ValueError: 'PyQt6 is not in list

This release fixes this.

Fix `fbs installer` on macOS

This improvement is only included in fbs Pro.

fbs installer gave the following error:

Cannot find support/ directory.

This release fixes this.

Fix "openfolder is not supported" on Apple Silicon

This improvement is only included in fbs Pro.

fbs installer gave the following error on Apple Silicon machines:

bless: The 'openfolder' is not supported on Apple Silicon devices.

This release fixes this.

Fix: Errors were not sent to Sentry on app exit

These improvements are only included in fbs Pro.

fbs Pro's error tracking via Sentry did not track exceptions that prevented the app from starting - see #283. This release fixes this. Thank you @apastel for the analysis and suggested fix!

Fix incorrect link in error message

Running fbs installer on Linux could give error:

fbs could not find executable 'fpm'. Please install fpm using the instructions at
https://fpm.readthedocs.io/en/latest/installing.html.

This link no longer works. It was fixed to be .../installation.html.

Thanks @meramsey for the fix!