Fix UISettings.fontScale property access modifier

To make available as bean property.

platform/editor-ui-api/src/com/intellij/ide/ui/UISettings.kt

@@ -57,7 +57,7 @@ class UISettings : BaseState(), PersistentStateComponent<UISettings> {
 
   @get:Property(filter = FontFilter::class)
   @get:OptionTag("FONT_SCALE")
-  private var fontScale by storedProperty(0f)
+  var fontScale by storedProperty(0f)
 
   @get:OptionTag("RECENT_FILES_LIMIT") var recentFilesLimit by storedProperty(50)
   @get:OptionTag("CONSOLE_COMMAND_HISTORY_LIMIT") var consoleCommandHistoryLimit by storedProperty(300)
@@ -197,10 +197,11 @@ class UISettings : BaseState(), PersistentStateComponent<UISettings> {
     override fun accepts(accessor: Accessor, bean: Any): Boolean {
       val settings = bean as UISettings
       val fontData = systemFontFaceAndSize
-      if ("FONT_FACE" == accessor.name) {
+      if ("fontFace" == accessor.name) {
         return fontData.first != settings.fontFace
       }
-      // store only in pair
+      // fontSize/fontScale should either be stored in pair or not stored at all
+      // otherwise the fontSize restore logic gets broken (see loadState)
       return !(fontData.second == settings.fontSize && 1f == settings.fontScale)
     }
   }
@@ -236,7 +237,7 @@ class UISettings : BaseState(), PersistentStateComponent<UISettings> {
     else {
       fontSize = JBUI.scale(fontSize / fontScale).toInt()
     }
-    fontScale = JBUI.scale(1f)
+    fontScale = JBUI.scale(1f) // at this moment JBUI.scale only depends on the HiDPI mode and the system scale
     initDefFont()
 
     // 1. Sometimes system font cannot display standard ASCII symbols. If so we have