Closes #1960 'Z' removes unmarked flows

mitmproxy/addons/view.py

@@ -230,6 +230,17 @@ class View(collections.Sequence):
         self.sig_view_refresh.send(self)
         self.sig_store_refresh.send(self)
 
+    def clear_not_marked(self):
+        """
+            Clears only the unmarked flows.
+        """
+        for flow in self._store.copy().values():
+            if not flow.marked:
+                self._store.pop(flow.id)
+
+        self._refilter()
+        self.sig_store_refresh.send(self)
+
     def add(self, f: mitmproxy.flow.Flow) -> bool:
         """
             Adds a flow to the state. If the flow already exists, it is

mitmproxy/tools/console/flowlist.py

@@ -35,6 +35,7 @@ def _mkhelp():
         ("W", "stream flows to file"),
         ("X", "kill and delete flow, even if it's mid-intercept"),
         ("z", "clear flow list or eventlog"),
+        ("Z", "clear unmarked flows"),
         ("tab", "tab between eventlog and flow list"),
         ("enter", "view flow"),
         ("|", "run script on this flow"),
@@ -354,6 +355,8 @@ class FlowListBox(urwid.ListBox):
                     self.master.view.update(f)
         elif key == "z":
             self.master.view.clear()
+        elif key == "Z":
+            self.master.view.clear_not_marked()
         elif key == "e":
             self.master.toggle_eventlog()
         elif key == "g":