Add Preferences window size to Config and update tests

tests/reference/baseConfig_novelwriter.conf

@@ -11,6 +11,7 @@ guilang = en-GB
 
 [Sizes]
 geometry = 1200, 650
+preferences = 700, 615
 treecols = 200, 50, 30
 novelcols = 200, 50
 projcols = 200, 60, 140

tests/reference/guiPreferences_novelwriter.conf

@@ -11,6 +11,7 @@ guilang = en-GB
 
 [Sizes]
 geometry = 1200, 650
+preferences = 700, 615
 treecols = 200, 50, 30
 novelcols = 200, 50
 projcols = 200, 60, 140

tests/test_gui/test_gui_projsettings.py

@@ -79,7 +79,7 @@ def testGuiProjSettings_Dialog(qtbot, monkeypatch, nwGUI, fncDir, fncProj, outDi
 
     assert projEdit.tabMain.editName.text() == "New Project"
     assert projEdit.tabMain.editTitle.text() == ""
-    assert projEdit.tabMain.editAuthors.toPlainText() == "Jane Smith\nJohn Smith\n"
+    assert projEdit.tabMain.editAuthors.toPlainText() == "Jane Smith\nJohn Smith"
     assert projEdit.tabMain.spellLang.currentData() == "en"
     assert projEdit.tabMain.doBackup.isChecked() is False