Fix about screen vertical centering.

There was a newline at the end of the last line on the third screen,
which was causing the label to not be centered vertically.
Removing it fixes the centering.

Author: mzrinsky

src/displayapp/screens/SystemInfo.cpp

@@ -198,7 +198,7 @@ std::unique_ptr<Screen> SystemInfo::CreateScreen3() {
                         " #808080 Free# %d/%d\n"
                         " #808080 Min free# %d\n"
                         " #808080 Alloc err# %d\n"
-                        " #808080 Ovrfl err# %d\n",
+                        " #808080 Ovrfl err# %d",
                         bleAddr[5],
                         bleAddr[4],
                         bleAddr[3],