adding Indicator fast scroller license

Author: tibbi

app/build.gradle

@@ -57,7 +57,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:5.22.2'
+    implementation 'com.simplemobiletools:commons:5.22.3'
     implementation 'joda-time:joda-time:2.10.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta2'
     implementation 'com.googlecode.ez-vcard:ez-vcard:0.10.5'

app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/MainActivity.kt

@@ -521,7 +521,7 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
     }
 
     private fun launchAbout() {
-        val licenses = LICENSE_JODA or LICENSE_GLIDE or LICENSE_GSON
+        val licenses = LICENSE_JODA or LICENSE_GLIDE or LICENSE_GSON or LICENSE_INDICATOR_FAST_SCROLL
 
         val faqItems = arrayListOf(
                 FAQItem(R.string.faq_1_title, R.string.faq_1_text),

app/src/main/kotlin/com/simplemobiletools/contacts/pro/extensions/String.kt

@@ -35,5 +35,3 @@ fun String.getDateTimeFromDateString(viewToUpdate: TextView? = null): DateTime {
 }
 
 fun String.normalizeNumber() = PhoneNumberUtils.normalizeNumber(this)
-
-fun String.areLettersOnly() = matches(Regex("[a-zA-Z]+"))

app/src/main/kotlin/com/simplemobiletools/contacts/pro/fragments/MyViewPagerFragment.kt

@@ -18,7 +18,6 @@ import com.simplemobiletools.contacts.pro.activities.MainActivity
 import com.simplemobiletools.contacts.pro.activities.SimpleActivity
 import com.simplemobiletools.contacts.pro.adapters.ContactsAdapter
 import com.simplemobiletools.contacts.pro.adapters.GroupsAdapter
-import com.simplemobiletools.contacts.pro.extensions.areLettersOnly
 import com.simplemobiletools.contacts.pro.extensions.config
 import com.simplemobiletools.contacts.pro.extensions.getVisibleContactSources
 import com.simplemobiletools.contacts.pro.helpers.*