Reduce buffer size

Currently buffer is being redrawn on each DB fetch,
this causes a big waste of resources as on every page_up button click
we redraw 1200 messages (each message can be longer than 1 line),
commit will reduce buffer size to 200,
thus reducing amount of messages redrawn on each page up,
this is a temporary solution for a bigger problem.

src/ui/buffer.c

@@ -53,7 +53,7 @@
 #include "ui/window.h"
 #include "ui/buffer.h"
 
-#define BUFF_SIZE 1200
+#define BUFF_SIZE 200
 
 struct prof_buff_t
 {