improve dialog styling

app/src/main/java/com/keylesspalace/tusky/LoginActivity.kt

@@ -15,7 +15,6 @@
 
 package com.keylesspalace.tusky
 
-import android.app.AlertDialog
 import android.content.ActivityNotFoundException
 import android.content.Context
 import android.content.Intent
@@ -29,6 +28,7 @@ import android.view.MenuItem
 import android.view.View
 import android.widget.EditText
 import android.widget.TextView
+import androidx.appcompat.app.AlertDialog
 import com.keylesspalace.tusky.di.Injectable
 import com.keylesspalace.tusky.entity.AccessToken
 import com.keylesspalace.tusky.entity.AppCredentials
@@ -42,7 +42,6 @@ import retrofit2.Callback
 import retrofit2.Response
 import javax.inject.Inject
 
-
 class LoginActivity : BaseActivity(), Injectable {
 
     @Inject
@@ -82,7 +81,7 @@ class LoginActivity : BaseActivity(), Injectable {
                     .setPositiveButton(R.string.action_close, null)
                     .show()
             val textView = dialog.findViewById<TextView>(android.R.id.message)
-            textView.movementMethod = LinkMovementMethod.getInstance()
+            textView?.movementMethod = LinkMovementMethod.getInstance()
         }
 
         if (isAdditionalLogin()) {

app/src/main/res/values-night/styles.xml

@@ -82,7 +82,8 @@
         <item name="android:background">?attr/selectableItemBackgroundBorderless</item>
     </style>
 
-    <style name="TuskyDialog.Dark" parent="@style/ThemeOverlay.MaterialComponents.Dialog">
+    <style name="TuskyDialog.Dark" parent="@style/ThemeOverlay.MaterialComponents.Dialog.Alert">
+        <item name="android:letterSpacing">0</item>
         <item name="dialogCornerRadius">8dp</item>
         <item name="android:colorBackground">@color/color_primary_dark_dark</item>
     </style>

app/src/main/res/values/styles.xml

@@ -130,7 +130,8 @@
         <item name="android:background">?attr/selectableItemBackgroundBorderless</item>
     </style>
 
-    <style name="TuskyDialog.Light" parent="@style/ThemeOverlay.MaterialComponents.Dialog">
+    <style name="TuskyDialog.Light" parent="@style/ThemeOverlay.MaterialComponents.Dialog.Alert">
+        <item name="android:letterSpacing">0</item>
         <item name="dialogCornerRadius">8dp</item>
     </style>
 
@@ -156,7 +157,6 @@
     </style>
 
     <style name="TuskyButton.TextButton" parent="Widget.MaterialComponents.Button.TextButton">
-        <item name="android:color">@color/tusky_blue</item>
         <item name="android:letterSpacing">0</item>
     </style>