Lataa Red Panda C++ 2.1

- fix: editors that not in the editing panel shouldn't trigger switch breakpoint
- fix: editors that not in the editing panel shouldn't show context menu
- enhancement: add "editors share one code parser" in "options" / "editor" / "code completion", to reduce memory usage.
- Turned off by default on PCs with memory > 4G; Force turned on PCs with memory < 1G.
- enhancement: add "goto block start"/"goto block end" in "Code" menu
- add fmtlib to the gcc compiler's lib distributed with RedPanda IDE windows version
- add default autolink for fmtlib in Windows
- reduce size of the executable of win-git-askpass tool
- change: remove "Optimize for the following machine" and "Optimize less, while maintaining full compatibility" options in the compiler setting panel, which are obseleted.
- change: escape spaces in the executabe path under linux.
- fix: Before run a project's executable, we should check timestamp for project files AND modification states of files openned in editor.
- change: Don't turn on "Show some more warnings (-Wextra)" option by default for DEBUG compiler set
- fix: Changes mainwindows's compiler set combobox not correctly handled for project
- change: Don't localize autogenerated name for new files and new project (new msys2 gcc compiler can't correctly handle non-ascii chars in filenames)
- change: rename "file" Menu -> "New Source File" to "New File"