* Add Missing Includes Across src/slic3r/GUI
Every GUI source and header now directly includes the headers declaring what it uses, rather than relying on the precompiled header or transitive includes. Generated with clang-tidy misc-include-cleaner, plus one hand edit making CalibrationPanel.hpp self-contained.
* Drop the OS-Specific Includes Added Outside Their Platform Guards
GLib, GTK, D-Bus and POSIX headers are only used inside platform #if blocks, which already include them. Added unconditionally at the top of the file they broke the Windows build.
* Add the clang-tidy Configuration That Generated These Includes
Only misc-include-cleaner's missing-include check, with the headers it must never suggest: per-platform, internal and OS-specific ones that would break other platforms or are not meant to be included directly.
* Match Windows Paths in the clang-tidy Ignore List
Header paths use backslashes on Windows, so every / in a pattern is now [/\\]. The Windows SDK headers are ignored alongside the other OS-specific ones, and the list is one pattern per line. Suggested by @raistlin7447 from a Windows clang-cl run.
Discovered builds were inserted positionally behind the whitelist entry they
anchored to, so an OTA-installed 02.08.01.53 listed below 02.08.01.52. The list
is now built by appending and sorting once, which also drops the per-entry
insertion scans.
"(installed)" tested whether the library was present on disk, so it marked every
version ever selected - switching leaves the previous library in place. The flag
is now is_loaded, resolved against the plug-in actually loaded, and the two
combo populators share one label helper.