Added save button

Author: atvanek

app/src/containers/CustomizationPanel.tsx

@@ -843,6 +843,21 @@ const CustomizationPanel = ({ isThemeLight }): JSX.Element => {
               )}
             </div>
             <div>
+              <div className={classes.buttonRow}>
+                <Button
+                  variant="contained"
+                  style={{ backgroundColor: 'green' }}
+                  className={
+                    isThemeLight
+                      ? `${classes.button} ${classes.saveButtonLight}`
+                      : `${classes.button} ${classes.saveButtonDark}`
+                  }
+                  onClick={handleSave}
+                  id="saveButton"
+                >
+                  SAVE
+                </Button>
+              </div>
               <div className={classes.buttonRow}>
                 <Button
                   variant="contained"
@@ -858,6 +873,7 @@ const CustomizationPanel = ({ isThemeLight }): JSX.Element => {
                   CSS
                 </Button>
               </div>
+
               <div>
                 <Button
                   variant="contained"