Column filling space for Text section on app page.

layouts/_default/app.html

@@ -59,12 +59,12 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
                     {{ .Content | markdownify }}
                 </div>
             {{ else if eq .Type "text/image" }}
-                <div class="column text-center">
+                <div class="column col1 col1-fill text-center">
                     {{ .Content | markdownify }}
                     <img src="/img/{{ .Image }}" alt="{{ .Alt }}" loading="lazy"/>
                 </div>
             {{ else if eq .Type "text" }}
-                <div class="column text-center">
+                <div class="column col1 col1-fill text-center">
                     {{ .Content | markdownify }}
                 </div>
             {{ end }}