emulator: imports work relatively to file being assembled (set cwd)

emulator/src/emulator/ui/editor.rs

@@ -146,7 +146,7 @@ impl Editor {
         }
 
         if let Some(path) = FileDialog::new()
-            .add_filter("damn simple files", &["dsa", "dsb", "dsc", "dsd"])
+            .add_filter("Assembly Files or Binaries", &["dsa", "dsb"])
             .add_filter("all", &["*"])
             .set_directory(&work_dir)
             .save_file()
@@ -169,17 +169,22 @@ impl Editor {
         });
 
         if let Some(path) = FileDialog::new()
-            .add_filter("damn simple files", &["dsa", "dsb", "dsc", "dsd"])
+            .add_filter("Assembly Files or Binaries", &["dsa", "dsb"])
             .add_filter("all", &["*"])
             .set_directory(&work_dir)
             .pick_file()
         {
             if let Ok(contents) = std::fs::read_to_string(&path) {
-                self.path = Some(path);
+                self.path = Some(path.clone());
                 self.text.clone_from(&contents);
                 self.buffer = contents;
                 self.unsaved = false;
             }
+
+            std::env::set_current_dir(
+                path.parent().expect("A file should be in a directory!"),
+            )
+            .expect("ERROR: Failed to set current working directory.");
         }
     }