Move text_* to strings_*

app/src/main/java/org/solovyev/android/calculator/buttons/CppSpecialButton.java

@@ -24,13 +24,12 @@ package org.solovyev.android.calculator.buttons;
 
 import org.solovyev.android.Check;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.util.HashMap;
 import java.util.Map;
 
-import javax.annotation.Nonnull;
+// see values/strings_glyphs.xml for glyph constants
-import javax.annotation.Nullable;
-
-// see values/text_glyphs.xml for glyph constants
 public enum CppSpecialButton {
 
     history("history", '\ue005'),

app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesFragment.java

@@ -137,9 +137,6 @@ public class PreferencesFragment extends org.solovyev.android.material.preferenc
         });
     }
 
-    private void prepareFloatingCalculatorPreferences() {
-    }
-
     private void prepareReportBug() {
         final Preference reportBug = findPreference("prefs.reportBug");
         reportBug.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {