* Help browser problem mitigation: on Qt6 (?), QTextBrowser appears to be reloading images relative to the new URL on a URL change. This caused 'missing resource' exceptions. As long as the root cause of this problem is not know, the exceptions are turned into log errors now.
* Fixed issue 1106
* Opportunity fix: library selection box listed libraries with technology even though no technology is selected.
* Opportunity: show PCell errors on new error layer. Previously, errors were only shown when the PCell had at least a single layer parameter
The error text is drawn together with guiding shapes. Disabling guiding shapes will
turn off error display.
* Opportunity: fixed an issue when reloading a library immediately after loading a layout: in this case, the library connection got lost and cells were substituted by static ones
* Opportunity: added a layout cleanup for the following case: a layout is loaded without the library present - giving defunct cells. Then the library is registered and defunct cells are reconnected.
* PyPI deployment: corrected branch filter
* skip redundant points in partial edit, but not colinear ones
* Polygon transformation now preserves raw points
* WIP: first attempt to fix issue-983
* WIP: bugfixes
* Fixed a problem with displaying empty cell dimensions, one warning
* Another fix: don't allow proxy cells to be selected in the instance properties dialog. This creates a confusing behaviour
* Fixed a few flaws in the cell selection scheme on the instance properties dialog.
* Early warning when trying to build a recursive hierarchy.
* Another fix: avoid too much undo in case of errors thrown during 'apply' followed by 'cancel'
* Fixed issue-983 solution
* Fixed the modification status of PCell parameters for 'apply to all'
The problem was essentially the "specific path" which got invalid.
The solution is to establish a better criterion for "path validity"
and use for failsafes against invalid paths.
In addition, the path validation has been modified such that a
better choice is made about the remaining path after a cell gets
deleted.