Web: Don't clear command state when the last keyboard event is modifier

We were losing track that the last command was a caret-navigation
command when Ctrl was released after using Ctrl+Home. As a result,
when the browser emits caret-moved and focus-changed events we
triggered, we process them rather than ignoring them as caused by us.

src/orca/input_event.py

@@ -869,6 +869,12 @@ class KeyboardEvent(InputEvent):
             msg = 'CONSUMED: %s (%s)' % (self._did_consume, self._result_reason)
             debug.println(debug.LEVEL_INFO, msg, True)
 
+        if debug.LEVEL_INFO >= debug.debugLevel and orca_state.activeScript:
+            attributes = orca_state.activeScript.getTransferableAttributes()
+            for key, value in attributes.items():
+                msg = 'INPUT EVENT: %s: %s' % (key, value)
+                debug.println(debug.LEVEL_INFO, msg, True)
+
         msg = 'TOTAL PROCESSING TIME: %.4f' % (time.time() - startTime)
         debug.println(debug.LEVEL_INFO, msg, True)
 

src/orca/scripts/web/script.py

@@ -563,9 +563,11 @@ class Script(default.Script):
             self._lastCommandWasMouseButton = False
             return consumes
 
-        self._lastCommandWasCaretNav = False
-        self._lastCommandWasStructNav = False
-        self._lastCommandWasMouseButton = False
+        if not keyboardEvent.isModifierKey():
+            self._lastCommandWasCaretNav = False
+            self._lastCommandWasStructNav = False
+            self._lastCommandWasMouseButton = False
+
         return super().consumesKeyboardEvent(keyboardEvent)
 
     def consumesBrailleEvent(self, brailleEvent):