reopen the files that were open the last time

raven/ui/tabs.py

@@ -62,3 +62,10 @@ class Tabs(QWidget):
 
         tab: Tab = self.tabs.widget(self.tabs.currentIndex())
         return tab.get_file()
+
+    def open_files(self) -> [str]:
+        result = []
+        for i in range(self.tabs.count()):
+            tab: Tab = self.tabs.widget(i)
+            result.append(tab.get_file())
+        return result