Fix wrong default font string for annotation tools

part/data/tools.xml

@@ -81,13 +81,13 @@ Annotation
     <tool id="5" type="typewriter">
         <engine type="PickPoint" block="true">
             <annotation type="Typewriter" color="#00ffffff" textColor="#000000" width="0"
-                        font="Noto Sans\\,10\\,-1\\,5\\,50\\,0\\,0\\,0\\,0\\,0\\,Regular"/>
+                        font="Noto Sans,10,-1,5,50,0,0,0,0,0,Regular"/>
         </engine>
     </tool>
     <tool id="6" type="note-inline">
         <engine type="PickPoint" color="#ffff00" hoverIcon="tool-note-inline" block="true">
             <annotation type="FreeText" color="#ffffff00"
-                        font="Noto Sans\\,10\\,-1\\,5\\,50\\,0\\,0\\,0\\,0\\,0\\,Regular"/>
+                        font="Noto Sans,10,-1,5,50,0,0,0,0,0,Regular"/>
         </engine>
     </tool>
     <tool id="7" type="note-linked">

part/pageviewannotator.cpp

@@ -156,7 +156,12 @@ public:
         // set font
         if (m_annotElement.hasAttribute(QStringLiteral("font"))) {
             QFont f;
-            f.fromString(m_annotElement.attribute(QStringLiteral("font")));
+            // Workaround broken old code that saved fonts incorrectly with extra backslashes
+            QString fontString = m_annotElement.attribute(QStringLiteral("font"));
+            if (fontString.count(QStringLiteral("\\\\,")) > 9) {
+                fontString.replace(QStringLiteral("\\\\,"), QStringLiteral(","));
+            }
+            f.fromString(fontString);
             ta->setTextFont(f);
         }
         // set font color