reduce regex calls in name highlighting

bink.py

@@ -142,10 +142,12 @@ class App():
         post_user = post["user"]
         time_seconds = post["time"] / 1_000_000_000
         stamp = datetime.datetime.fromtimestamp(time_seconds)
-        if current_user != post_user and name_re.search(body):
+        if current_user != post_user:
+            search = name_re.finditer(body)
+            if search:
                 widget_body = []
                 index = 0
-            for match in name_re.finditer(body):
+                for match in search:
                     start, end = match.span()
                     before = body[index:start]
                     highlight = body[start:end]