Add PIN feature to README.

Remove hint from PIN setup dialog.

README.md

@@ -24,6 +24,7 @@ TachiyomiEH is a fork of the [original Tachiyomi app](https://github.com/inorich
 * Full offline tag/namespace searching support
 * Batch import galleries
 * Automatically open E-Hentai/ExHentai links
+* Lock the app with a PIN code
 
 ### Built-in manga sources
 ##### SFW

app/src/main/java/exh/ui/lock/LockPreference.kt

@@ -42,7 +42,7 @@ class LockPreference @JvmOverloads constructor(context: Context, attrs: Attribut
                     .content("Enter a pin to lock the application. Enter nothing to disable the pin lock.")
                     .inputRangeRes(0, 10, R.color.material_red_500)
                     .inputType(InputType.TYPE_CLASS_NUMBER)
-                    .input("Password", "", { _, c ->
+                    .input("", "", { _, c ->
                         val progressDialog = MaterialDialog.Builder(context)
                                 .title("Saving password")
                                 .progress(true, 0)