ensure button is always center

xml/pg_view_style.xsl

@@ -68,7 +68,7 @@ span.engraved {
         <div style="background: darkgray; position: sticky; top: 0; margin: 0; padding: 0; width: 100%; z-index: 1; text-align: center;">
         <form action="random">
           <button type="submit" style="margin: 0.2em">Generate</button>
-          <span style="float: right">
+          <span style="position: absolute; right: 0; padding: 0.4em">
           <a>
           <xsl:attribute name="href">./pg?<xsl:for-each select="//row"><xsl:value-of select="category"/>=<xsl:value-of select="translate(reference,' ','')"/>+<xsl:value-of select="translation"/><xsl:if test="position() != last()">&#038;</xsl:if></xsl:for-each></xsl:attribute>
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