Don't shrink error icon for long error text

Oops, previously the MajorErrorMessage was willing to shrink the width of the cute Grundo Programmer icon, to allow error messages with long words to avoid word breaks.

Here, we switch `1fr` for `minmax(0, 1fr)`, which allows the text zone to get smaller. (`1fr` is short for `minmax(auto, 1fr)`, which isn't capable of shrinking smaller than the natural value.)

Now, the error text is more willing to shrink by word-wrapping, than the image is by shrinking the image. Success!

src/app/util.js

@@ -392,7 +392,7 @@ export function MajorErrorMessage({ error }) {
     <Flex justify="center" marginTop="8">
       <Grid
         templateAreas='"icon title" "icon description" "icon details"'
-        templateColumns="auto 1fr"
+        templateColumns="auto minmax(0, 1fr)"
         maxWidth="500px"
         marginX="8"
         columnGap="4"