Added cross platform support for file and folder select widgets

core/src/gui/widgets/file_select.h

@@ -3,16 +3,11 @@
 #include <imgui_internal.h>
 #include <stdint.h>
 #include <string>
-
-#ifdef _WIN32
-#include <Windows.h>
 #include <thread>
-#include <ShlObj.h>
-#endif
 
 class FileSelect {
 public:
-    FileSelect(std::string defaultPath);
+    FileSelect(std::string defaultPath, std::vector<std::string> filter = {"All Files", "*"});
     bool render(std::string id);
     void setPath(std::string path);
     bool pathIsValid();
@@ -20,20 +15,13 @@ public:
     std::string expandString(std::string input);
 
     std::string path = "";
-
-#ifdef _WIN32
-    void setWindowsFilter(COMDLG_FILTERSPEC* filt, int n);
-#endif
+    
 
 private:
-#ifdef _WIN32
-    void windowsWorker();
+    void worker();
     std::thread workerThread;
-    COMDLG_FILTERSPEC* filter = NULL;
-    int filterCount = 0;
-#endif
+    std::vector<std::string> _filter;
 
-    char _filter[2048];
     bool pathValid = false;
     bool dialogOpen = false;
     char strPath[2048];