Fix Build Novel Project test on Ubuntu

tests/reference/guiBuild_Tool_Step1_Lorem_Ipsum.htm

@@ -5,7 +5,7 @@
 <title>Lorem Ipsum</title>
 </head>
 <style>
-body {font-family: 'Sans'; font-size: 12pt}
+body {font-family: 'DejaVu Sans'; font-size: 11pt}
 p {text-align: left;}
 h1, h2 {color: rgb(66, 113, 174);}
 h3, h4 {color: rgb(50, 50, 50);}

tests/reference/guiBuild_Tool_Step2_Lorem_Ipsum.htm

@@ -5,7 +5,7 @@
 <title>Lorem Ipsum</title>
 </head>
 <style>
-body {font-family: 'Sans'; font-size: 12pt}
+body {font-family: 'DejaVu Sans'; font-size: 11pt}
 p {text-align: justify;}
 h1, h2 {color: rgb(66, 113, 174);}
 h3, h4 {color: rgb(50, 50, 50);}

tests/reference/guiBuild_Tool_Step3_Lorem_Ipsum.htm

@@ -5,7 +5,7 @@
 <title>Lorem Ipsum</title>
 </head>
 <style>
-body {font-family: 'Sans'; font-size: 12pt}
+body {font-family: 'DejaVu Sans'; font-size: 11pt}
 p {text-align: justify;}
 h1, h2 {color: rgb(66, 113, 174);}
 h3, h4 {color: rgb(50, 50, 50);}

tests/reference/guiBuild_Tool_Step4H_Lorem_Ipsum.json

@@ -9,7 +9,7 @@
   },
   "text": {
     "css": [
-      "body {font-family: 'Sans'; font-size: 12pt}",
+      "body {font-family: 'DejaVu Sans'; font-size: 11pt}",
       "p {text-align: justify;}",
       "h1, h2 {color: rgb(66, 113, 174);}",
       "h3, h4 {color: rgb(50, 50, 50);}",

tests/reference/guiBuild_Tool_Step4_Lorem_Ipsum.htm

@@ -5,7 +5,7 @@
 <title>Lorem Ipsum</title>
 </head>
 <style>
-body {font-family: 'Sans'; font-size: 12pt}
+body {font-family: 'DejaVu Sans'; font-size: 11pt}
 p {text-align: justify;}
 h1, h2 {color: rgb(66, 113, 174);}
 h3, h4 {color: rgb(50, 50, 50);}

tests/test_gui/test_gui_build.py

@@ -59,6 +59,9 @@ def testGuiBuild_Tool(qtbot, monkeypatch, nwGUI, nwLipsum, refDir, outDir):
     nwBuild = getGuiItem("GuiBuildNovel")
     assert isinstance(nwBuild, GuiBuildNovel)
 
+    nwBuild.textFont.setText("DejaVu Sans")
+    nwBuild.textSize.setValue(11)
+
     # Default Settings
     qtbot.mouseClick(nwBuild.buildNovel, Qt.LeftButton)