[LyX/master] Merge branch 'killqt4'

[Jean-Marc Lasgouttes]

commit 9376f0203d5d314639f7207111a4aba8ac070859
Merge: ebcc413 8120361
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Mon Nov 28 15:19:41 2022 +0100

    Merge branch 'killqt4'
    
    Remove all trace of Qt4 support. The different elements have been
    considered carefully before removal.
    
    The only changes that need to be done concern Windows and macOS
    compilation instruction and will need to be taken care of by the
    respective maintainers before prerelease.
    
    The file TODO.killqt4 lists what remains to be done.

 CMakeLists.txt                                |   33 +-
 INSTALL                                       |   15 +-
 INSTALL.cmake                                 |    4 +-
 README                                        |    3 +-
 TODO.killqt4                                  |   12 +
 config/lyxinclude.m4                          |   23 +-
 config/qt.m4                                  |   82 +--
 configure.ac                                  |    3 -
 development/LyX-Mac-binary-release.sh         |    2 +-
 development/Makefile.am                       |    1 -
 development/autotests/keytest.py              |    2 +-
 development/cmake/ConfigureChecks.cmake       |   13 -
 development/cmake/modules/FindQt4.cmake       | 1046 -------------------------
 development/cmake/modules/LyXMacros.cmake     |    6 +-
 development/cmake/modules/LyXPaths.cmake      |   88 +--
 development/cmake/post_install/CMakeLists.txt |    4 -
 development/lyxserver/server_monitor.cpp      |    8 +-
 development/lyxserver/server_monitor.pro      |    2 +-
 lib/RELEASE-NOTES                             |    3 +-
 lib/fonts/test/check_glyphs.lyx               |    8 +-
 lib/symbols                                   |    8 +-
 src/frontends/qt/CMakeLists.txt               |    1 -
 src/frontends/qt/FancyLineEdit.cpp            |   17 +-
 src/frontends/qt/GuiApplication.cpp           |  132 +---
 src/frontends/qt/GuiApplication.h             |   13 +-
 src/frontends/qt/GuiBibtex.cpp                |    9 -
 src/frontends/qt/GuiCitation.cpp              |    9 -
 src/frontends/qt/GuiCompleter.cpp             |    4 +-
 src/frontends/qt/GuiDocument.cpp              |   27 +-
 src/frontends/qt/GuiFontLoader.cpp            |   82 +--
 src/frontends/qt/GuiFontMetrics.cpp           |   46 +-
 src/frontends/qt/GuiFontMetrics.h             |    4 -
 src/frontends/qt/GuiImage.cpp                 |   28 +-
 src/frontends/qt/GuiKeySymbol.cpp             |    4 +-
 src/frontends/qt/GuiLyXFiles.cpp              |    5 -
 src/frontends/qt/GuiPainter.cpp               |    7 -
 src/frontends/qt/GuiPrefs.cpp                 |   18 +-
 src/frontends/qt/GuiRef.cpp                   |    5 -
 src/frontends/qt/GuiSearch.cpp                |   34 +-
 src/frontends/qt/GuiToolbar.cpp               |    2 +-
 src/frontends/qt/GuiView.cpp                  |   29 +-
 src/frontends/qt/GuiWorkArea.cpp              |   35 +-
 src/frontends/qt/Menus.cpp                    |   28 +-
 src/frontends/qt/PanelStack.cpp               |    2 +-
 src/frontends/qt/TocWidget.cpp                |    5 -
 src/frontends/qt/qt_helpers.cpp               |   18 -
 src/frontends/qt/qt_helpers.h                 |    6 -
 src/lyxfind.cpp                               |    9 +-
 src/support/FileMonitor.cpp                   |    8 -
 src/support/FileName.cpp                      |    4 -
 src/support/Package.cpp                       |   11 +-
 src/support/filetools.cpp                     |    6 +-
 52 files changed, 186 insertions(+), 1788 deletions(-)