don't restore focus after rebuild on move jump

Limiting the number of results for an exact move last doesn't make sense
if we will try to restore the focus first on the reversed threadlist,
potentially loading all threads with the default configuration.

alot/buffers/search.py

@@ -46,7 +46,7 @@ def get_info(self):
         info['result_count_positive'] = 's' if self.result_count > 1 else ''
         return info
 
-    def rebuild(self, reverse=False):
+    def rebuild(self, reverse=False, restore_focus=True):
         self.isinitialized = True
         self.reversed = reverse
         selected_thread = None
@@ -56,7 +56,7 @@ def rebuild(self, reverse=False):
         else:
             order = self.sort_order
 
-        if self.threadlist:
+        if restore_focus and self.threadlist:
             selected_thread = self.get_selected_thread()
 
         exclude_tags = settings.get_notmuch_setting('search', 'exclude_tags')
@@ -116,7 +116,7 @@ def focus_first(self):
         if not self.reversed:
             self.body.set_focus(0)
         else:
-            self.rebuild(reverse=False)
+            self.rebuild(reverse=False, restore_focus=False)
             self.body.set_focus(0)
 
     def focus_last(self):
@@ -129,7 +129,7 @@ def focus_last(self):
             num_lines = len(self.threadlist.get_lines())
             self.body.set_focus(num_lines - 1)
         else:
-            self.rebuild(reverse=True)
+            self.rebuild(reverse=True, restore_focus=False)
             self.body.set_focus(0)
 
     def focus_thread(self, thread):