fix(scroll): handle edge case of extremely long messages

Prior commit (6ad8a190) did not properly handle overflow by long (9000 lines) message,
to address this issue, multiple changes were made:
- Add lines recalculation on win_redraw
- Move `prof_buff_t` struct to header file so its lines could be externally changed
- Call win_redraw once overflow is detected: it allows to recalculate sizes in lines and apply changes to the buffer

src/ui/buffer.c

@@ -114,7 +114,7 @@ _buffer_add(ProfBuff buffer, const char* show_char, int pad_indent, GDateTime* t
         int old_lines = buffer->lines;
         win_redraw(wins_get_current());
         log_debug("Ncurses Overflow! From: %s, position: %d, ID: %s, append: %s, used message buffer size: %d, rendered lines: (old: %d/ actual: %d/ max: %d)",
-                    from_jid, y_start_pos, id, append ? "TRUE" : "FALSE", g_slist_length(buffer->entries), old_lines, buffer->lines, PAD_SIZE);
+                  from_jid, y_start_pos, id, append ? "TRUE" : "FALSE", g_slist_length(buffer->entries), old_lines, buffer->lines, PAD_SIZE);
     }
 
     buffer->entries = append ? g_slist_append(buffer->entries, e) : g_slist_prepend(buffer->entries, e);