Trim the README and polish the display selection

The settings-storage paragraph goes back to the one sentence it was. The screen list now shows native resolutions rather than the scaled ones, the Turkish tab is named Ekran, and the repositioning comment says what a named screen changes.

dikte/settings_ui.py

@@ -732,10 +732,14 @@ class SettingsWindow(QDialog):
         self.indicator_screen = QComboBox()
         self.indicator_screen.addItem(t("Follow the mouse pointer"), "")
         for screen in QGuiApplication.screens():
+            # The native resolution, so that a scaled 4K screen reads
+            # 3840 × 2160 and not the 1920 × 1080 Qt sees through the scale.
             area = screen.geometry()
+            ratio = screen.devicePixelRatio()
             self.indicator_screen.addItem(
                 t("{name} ({width} × {height})", name=screen.name(),
-                  width=area.width(), height=area.height()),
+                  width=round(area.width() * ratio),
+                  height=round(area.height() * ratio)),
                 screen.name(),
             )
         form.addRow(t("Indicator screen"), self.indicator_screen)