Notepad++ v8.9.3 Release Candidate

[donho]

In progress...

Notepad++ 8.9.3 Release Candidate is available here:
https://github.com/donho/notepad-plus-plus/releases/tag/RC

Notepad++ v8.9.3 regression fixes, bug-fixes & new improvements:

1. Regression fix: a crash in User Defined Language. (Fix #17520)
2. Regression-fix: wrongly added parenthesis for some multi-bytes characters. (Fix #17521, #17802)
3. Regression-fix: incorrect function list text display for non-UTF8 documents. (Fix #17847)
4. Regression-fix: ProjectPanel Workspace text localization issue. (Fix community report)
5. Regression-fix: Change History margin not enabled by default. (Fix comment repport)
6. Regression-fix: Notepad++ update & plugin download fail behind corporate MITM proxies. (Fix community report)
7. Improve Notepad++ startup performance. (Fix #16175)
8. Update Scintilla to 5.6.0 & Lexilla to 5.4.7. (Implement #17562)
9. Fix Find in Files failing to search file content on disk. (Fix #16177, #17070)
10. Add disableNppAutoUpdate.xml to disable auto-update when WinGUp (GUP.exe) is present. (Implement #17836)
11. Fix a memory leak on exit. (Fix #17817)
12. Add an option to disable selected text drag-and-drop. (Fix #2571, #11335)
13. Fix wrong theme-writing path for non-ProgramFiles installations. (Fix comment repport)
14. Enhancement: prevent XML config files from being overwritten when updating portable package (copy/paste). (Fix #9755, #14279, #15120)
15. Fix incomplete Find dialg tab translation when 1st opêned from Project Panels. (Fix community report)
16. Fix Notepad++ spawning a new Windows Explorer process in Task Manager. (Fix comment repport)
17. Add Function List & Autocompletion for D language. (Fix #17349)