Fix variable tracing in new eRPC interface.

Replace PYRO with ERPC. Work In Progress.

Fix blind replace ('text' into 'str') from py3 port

Fix settings URL: now '/' instead of '/settings'

Merge

SVGHMI: Fixes UI lifecycle problems

Was sometime showing HMI tree of previously closed project : no more module globals to store hmi tree.
C++ dead object exceptions happened when re-opening SVGHMI UI or building after close of UI.

IDE: Libraries in OrderedDict for access by name

SVGHMI: fix exception when stopping

SVGHMI: fix JS error loading empty single page

svg:svg tag should not be considered as a detachable group,
so filter only svg:g elements

IDE: fix exception showing network discovery

SVGHMI: Fix creation of SVG file if none provided

IDE: Auto-select required libraries when adding extension

IDE: Disable not-yet-working extensions

Fix typo in README.md

IDE: py3.10 related float/int fixes in debug plots

Move tests/project/modbus in exemples.

Python3 fixes for Modbus Web Settings

Fix template conflict in XSLT with lxml>=4.9.0 again

Earlier attempt was fixing conflict with -1.0 priority attribute,
as a side effect of such low priority, SFC Actions were not
editable anymore.

This time move template around instead of using explicit priority.

Revert "IDE: fix exception when adding Action"

This reverts commit 94e42cda0a8e093aac4830b5c40656c240ec8cf9.

IDE: fix exception when adding Action

IDE: Fix status bar update when conection lost

SVGHMI: Fix watchdog exception on windows

Typo

Upgrade wxPython to 4.2.1, drop 4.2.0 workaroud

Runtime: add GetVersions() call to PLCObject, use it in web settings and expose it in WAMP and Pyro.

Note: WAMP changes are untested

Runtime: Add stderr support to local posix spawn based subprocess replacement

Modbus: More verbose error message in case of thread creation problem

Runtime web settings: fix punctuation and update CSS again