Fix gcc issue with std::filesystem

Author: timothyschoen

Source/PluginEditor.cpp

@@ -426,7 +426,7 @@ void PluginEditor::paint(Graphics& g)
     // This is easier than having to replicate the DnD highlight at the edge of the NVG window.
     if (welcomePanel->isVisible()) {
         g.setColour(findColour(PlugDataColour::panelBackgroundColourId));
-        g.fillRect(workArea.withTrimmedTop(5).withTrimmedBottom(50));
+        g.fillRect(workArea.withTrimmedTop(5));
     }
 }
 

Source/Utility/OSUtils.cpp

@@ -14,7 +14,7 @@
 #    include <raw_keyboard_input/raw_keyboard_input.cpp>
 #endif
 
-#if defined(__cpp_lib_filesystem) && (!defined(__APPLE__) || __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500)
+#if (defined(__cpp_lib_filesystem) || __has_include(<filesystem>)) && (!defined(__APPLE__) || __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500)
 #    include <filesystem>
 namespace fs = std::filesystem;
 #elif defined(__cpp_lib_experimental_filesystem)