Created GoToCellDialog class that will open a dialog that will allow
typing a cell like name and then press OK or Cancel Buttons.

Signed-off-by: Corbin Weidner <cweidner3+git@gmail.com>
Created a Sort Dialog

Signed-off-by: Corbin Weidner <cweidner3+git@gmail.com>
updated main.cpp

Signed-off-by: Corbin Weidner <cweidner3+git@gmail.com>