refactor: removed constant sizes

src/app/deals/components/mobile/CreateBoardButtonMobile/CreateBoardButtonMobile.module.css

@@ -1,6 +1,6 @@
 
 .create-button {
-    padding: 11px 10px 12px 10px;
+    padding: 10px 10px 11px 10px;
     border-bottom: 2px solid gray;
 }
 

src/app/deals/components/mobile/CreateBoardButtonMobile/CreateBoardButtonMobile.tsx

@@ -16,7 +16,7 @@ const CreateBoardButtonMobile = () => {
                     <Box
                         onClick={startEditing}
                         className={styles["create-button"]}>
-                        <IconPlus size={22} />
+                        <IconPlus />
                     </Box>
                 )}
                 modalTitle={"Создание доски"}