Fix 2 "[WARN] FOUserAgent - Destination: Unresolved ID reference"

messages when building help pdf. The problem is when linking to an id
defined in a title tag.
1. destination "trans-match-col" in Help_ch_Transactions.xml:
  Html: clicking the link incorrectly takes you to the start of the
  enclosing sect1 tag
  Pdf: link not created
2. destination "report-common.title" in Help_ch_Reports.xml:
  Html: link works
  Pdf: link not created
The fix is to move the id's from the title tag to the previous sectx
tag. This was simple in Help_ch_Reports.xml as there was already an
enclosing sectx tag but in Help_ch_Transactions.xml new sect's had to be
created and this involved much indenting. No content is changed in this
commit.
After the fix, the links work correctly in both html + pdf.

manual/C/Help_ch_Reports.xml

@@ -221,7 +221,7 @@
     </sect2>
 
     <sect2 id="report-common">
-      <title id="report-common.title">Common Report Options</title>
+      <title>Common Report Options</title>
 
       <para>Many reports share similar options. Some common ones include:
       </para>
@@ -2192,7 +2192,7 @@ Income (type INCOME)
           <title>Report Options</title>
 
           <note>
-            <para>See <link linkend='report-common' endterm="report-common.title"/> in the <emphasis>Configuring
+            <para>See <xref linkend="report-common"/> in the <emphasis>Configuring
               Reports and Charts</emphasis> section of this help manual for more details of the
               common options.
             </para>
@@ -2206,26 +2206,26 @@ Income (type INCOME)
               <itemizedlist>
                 <listitem>
                   <para><guilabel>Report name</guilabel>: Enter a descriptive name for this report - see
-                    <link linkend='report-common' endterm="report-common.title"/>.
+                    <xref linkend="report-common"/>.
                   </para>
                 </listitem>
 
                 <listitem>
                   <para><guilabel>Stylesheet</guilabel>: Select a style sheet for this report - see
-                    <link linkend='report-common' endterm="report-common.title"/>.
+                    <xref linkend="report-common"/>.
                   </para>
                 </listitem>
 
                 <listitem>
                   <para><guilabel>To</guilabel>: Select a date to report on or a named date. Transactions up to and
                     including the selected date will be used to calculate the outstanding aged
-                    balances. See <link linkend='report-common' endterm="report-common.title"/>.
+                    balances. See <xref linkend="report-common"/>.
                   </para>
                 </listitem>
 
                 <listitem>
                   <para><guilabel>Report's currency</guilabel>: Select the currency to display the values in - see
-                    <link linkend='report-common' endterm="report-common.title"/>
+                    <xref linkend="report-common"/>
                   </para>
                 </listitem>
 
@@ -2487,7 +2487,7 @@ Income (type INCOME)
           <title>Report Options</title>
 
           <note>
-            <para>See <link linkend='report-common' endterm="report-common.title"/> in the <emphasis>Configuring
+            <para>See <xref linkend="report-common"/> in the <emphasis>Configuring
               Reports and Charts</emphasis> section of this help manual for more details of the
               common options.
             </para>
@@ -2501,26 +2501,26 @@ Income (type INCOME)
               <itemizedlist>
                 <listitem>
                   <para><guilabel>Report name</guilabel>: Enter a descriptive name for this report - see
-                    <link linkend='report-common' endterm="report-common.title"/>.
+                    <xref linkend="report-common"/>.
                   </para>
                 </listitem>
 
                 <listitem>
                   <para><guilabel>Stylesheet</guilabel>: Select a style sheet for this report - see
-                    <link linkend='report-common' endterm="report-common.title"/>.
+                    <xref linkend="report-common"/>.
                   </para>
                 </listitem>
 
                 <listitem>
                   <para><guilabel>To</guilabel>: Select a date to report on or a named date. Transactions up to and
                     including the selected date will be used to calculate the outstanding aged
-                    balances. See <link linkend='report-common' endterm="report-common.title"/>.
+                    balances. See <xref linkend="report-common"/>.
                   </para>
                 </listitem>
 
                 <listitem>
                   <para><guilabel>Report's currency</guilabel>: Select the currency to display the values in - see
-                    <link linkend='report-common' endterm="report-common.title"/>.
+                    <xref linkend="report-common"/>.
                   </para>
                 </listitem>