Merge pull request 'Add a setting to preserve custom font scaling setting' (#514) from font-setting into master

Reviewed-on: #514
Reviewed-by: Dan Ballard <dan@openprivacy.ca>

settings/settings.go

@@ -56,6 +56,7 @@ type GlobalSettings struct {
 	UseTorCache             bool
 	TorCacheDir             string
 	BlodeuweddPath          string
+	FontScaling             float64
 }
 
 var DefaultGlobalSettings = GlobalSettings{
@@ -81,6 +82,7 @@ var DefaultGlobalSettings = GlobalSettings{
 	UseTorCache:             false,
 	TorCacheDir:             "",
 	BlodeuweddPath:          "",
+	FontScaling:             1.0, // use the system pixel scaling default
 }
 
 func InitGlobalSettingsFile(directory string, password string) (*GlobalSettingsFile, error) {