tdf#149723 Fix Piano Impress template

Add presentation:class attributes to date-time, footer and page-number
of Piano master page
Add light grey color to footers on Piano1 master page

Change-Id: I08c405df32639d77ef9ae8d59c1333e70215ce40
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/137007
Tested-by: Jenkins
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
diff --git a/extras/source/templates/presnt/Piano/styles.xml b/extras/source/templates/presnt/Piano/styles.xml
index e54a56c..3c62c0b 100644
--- a/extras/source/templates/presnt/Piano/styles.xml
+++ b/extras/source/templates/presnt/Piano/styles.xml
@@ -648,6 +648,17 @@
      <loext:graphic-properties draw:fill-color="#000000"/>
      <style:paragraph-properties fo:text-align="center"/>
    </style:style>
    <style:style style:name="MP12" style:family="paragraph">
      <style:text-properties fo:color="#eeeeee" fo:font-size="14pt" style:font-size-asian="14pt" style:font-size-complex="14pt"/>
    </style:style>
    <style:style style:name="MP13" style:family="paragraph">
      <style:paragraph-properties fo:text-align="center"/>
      <style:text-properties fo:color="#eeeeee" fo:font-size="14pt" style:font-size-asian="14pt" style:font-size-complex="14pt"/>
    </style:style>
    <style:style style:name="MP14" style:family="paragraph">
      <style:paragraph-properties fo:text-align="end"/>
      <style:text-properties fo:color="#eeeeee" fo:font-size="14pt" style:font-size-asian="14pt" style:font-size-complex="14pt"/>
    </style:style>
    <style:style style:name="MT1" style:family="text">
      <style:text-properties fo:font-size="14pt" style:font-size-asian="14pt" style:font-size-complex="14pt"/>
    </style:style>
@@ -813,7 +824,7 @@
        <text:p/>
        <draw:enhanced-geometry svg:viewBox="0 0 21600 21600" draw:type="rectangle" draw:enhanced-path="M 0 0 L 21600 0 21600 21600 0 21600 0 0 Z N"/>
      </draw:custom-shape>
      <draw:frame presentation:style-name="Mpr3" draw:text-style-name="MP2" draw:layer="backgroundobjects" svg:width="6.523cm" svg:height="1.086cm" svg:x="1cm" svg:y="14.35cm">
      <draw:frame presentation:style-name="Mpr3" draw:text-style-name="MP2" draw:layer="backgroundobjects" svg:width="6.523cm" svg:height="1.086cm" svg:x="1cm" svg:y="14.35cm" presentation:class="date-time">
        <draw:text-box>
          <text:p text:style-name="MP1">
            <text:span text:style-name="MT1">
@@ -822,7 +833,7 @@
          </text:p>
        </draw:text-box>
      </draw:frame>
      <draw:frame presentation:style-name="Mpr3" draw:text-style-name="MP10" draw:layer="backgroundobjects" svg:width="8.875cm" svg:height="1.086cm" svg:x="9.563cm" svg:y="14.348cm">
      <draw:frame presentation:style-name="Mpr3" draw:text-style-name="MP10" draw:layer="backgroundobjects" svg:width="8.875cm" svg:height="1.086cm" svg:x="9.563cm" svg:y="14.348cm" presentation:class="footer">
        <draw:text-box>
          <text:p text:style-name="MP9">
            <text:span text:style-name="MT1">
@@ -831,7 +842,7 @@
          </text:p>
        </draw:text-box>
      </draw:frame>
      <draw:frame presentation:style-name="Mpr3" draw:text-style-name="MP4" draw:layer="backgroundobjects" svg:width="6.523cm" svg:height="1.086cm" svg:x="20.477cm" svg:y="14.35cm">
      <draw:frame presentation:style-name="Mpr3" draw:text-style-name="MP4" draw:layer="backgroundobjects" svg:width="6.523cm" svg:height="1.086cm" svg:x="20.477cm" svg:y="14.35cm" presentation:class="page-number">
        <draw:text-box>
          <text:p text:style-name="MP3">
            <text:span text:style-name="MT1">
@@ -895,7 +906,7 @@
      </draw:frame>
      <draw:frame presentation:style-name="Mpr7" draw:text-style-name="MP2" draw:layer="backgroundobjects" svg:width="6.523cm" svg:height="1.086cm" svg:x="1cm" svg:y="14.35cm" presentation:class="date-time">
        <draw:text-box>
          <text:p text:style-name="MP1">
          <text:p text:style-name="MP12">
            <text:span text:style-name="MT1">
              <presentation:date-time/>
            </text:span>
@@ -904,7 +915,7 @@
      </draw:frame>
      <draw:frame presentation:style-name="Mpr7" draw:text-style-name="MP10" draw:layer="backgroundobjects" svg:width="8.875cm" svg:height="1.086cm" svg:x="9.563cm" svg:y="14.348cm" presentation:class="footer">
        <draw:text-box>
          <text:p text:style-name="MP9">
          <text:p text:style-name="MP13">
            <text:span text:style-name="MT1">
              <presentation:footer/>
            </text:span>
@@ -913,7 +924,7 @@
      </draw:frame>
      <draw:frame presentation:style-name="Mpr7" draw:text-style-name="MP4" draw:layer="backgroundobjects" svg:width="6.523cm" svg:height="1.086cm" svg:x="20.477cm" svg:y="14.35cm" presentation:class="page-number">
        <draw:text-box>
          <text:p text:style-name="MP3">
          <text:p text:style-name="MP14">
            <text:span text:style-name="MT1">
              <text:page-number/>
            </text:span>