Always hide empty memories in bank editor

There's not much point is showing empty memories in the bank editor,
so always hide them for brevity.

Author: kk7ds

chirp/drivers/fake.py

@@ -251,6 +251,7 @@ def __init__(self, pipe):
         self._specials = [chirp_common.Memory(100 + i) for i in range(3)]
         for i, mem in enumerate(self._memories + self._specials):
             mem.freq = 146000000 + (i * 100000)
+            mem.empty = i < 5
             if mem in self._specials:
                 mem.extd_number = 'Special %i' % mem.number
         self._special_names = [x.extd_number for x in self._specials]

chirp/wxui/bankedit.py

@@ -292,6 +292,10 @@ def _refresh_memory(self, mem):
         self._memory_cache[mem.extd_number or mem.number] = mem
         self._grid.SetRowLabelValue(self.mem2row(mem),
                                     mem.extd_number or ('%i' % mem.number))
+        if mem.empty:
+            self._grid.HideRow(self.mem2row(mem))
+        else:
+            self._grid.ShowRow(self.mem2row(mem))
 
         bank_index = None
         member = [bank.get_index()