store the titles of edited timezones in shared prefs

app/build.gradle

@@ -41,7 +41,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:3.14.2'
+    implementation 'com.simplemobiletools:commons:3.14.4'
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'
 }
 

app/src/main/kotlin/com/simplemobiletools/clock/dialogs/EditTimeZoneDialog.kt

@@ -4,6 +4,7 @@ import android.support.v7.app.AlertDialog
 import com.simplemobiletools.clock.R
 import com.simplemobiletools.clock.activities.SimpleActivity
 import com.simplemobiletools.clock.extensions.config
+import com.simplemobiletools.clock.helpers.EDITED_TIME_ZONE_SEPARATOR
 import com.simplemobiletools.clock.helpers.getDefaultTimeZoneTitle
 import com.simplemobiletools.clock.models.MyTimeZone
 import com.simplemobiletools.commons.extensions.setupDialogStuff
@@ -33,8 +34,22 @@ class EditTimeZoneDialog(val activity: SimpleActivity, val myTimeZone: MyTimeZon
         val editedTimeZoneTitles = activity.config.editedTimeZoneTitles
         val editedTitlesMap = HashMap<Int, String>()
         editedTimeZoneTitles.forEach {
-            val parts = it.split(":".toRegex(), 2)
+            val parts = it.split(EDITED_TIME_ZONE_SEPARATOR.toRegex(), 2)
+            editedTitlesMap[parts[0].toInt()] = parts[1]
         }
+
+        if (newTitle.isEmpty()) {
+            editedTitlesMap.remove(myTimeZone.id)
+        } else {
+            editedTitlesMap[myTimeZone.id] = newTitle
+        }
+
+        val newTitlesSet = HashSet<String>()
+        for ((key, value) in editedTitlesMap) {
+            newTitlesSet.add("$key$EDITED_TIME_ZONE_SEPARATOR$value")
+        }
+
+        activity.config.editedTimeZoneTitles = newTitlesSet
         callback()
     }
 }

app/src/main/kotlin/com/simplemobiletools/clock/helpers/Constants.kt

@@ -9,6 +9,7 @@ const val SELECTED_TIME_ZONES = "selected_time_zones"
 const val EDITED_TIME_ZONE_TITLES = "edited_time_zone_titles"
 
 const val TABS_COUNT = 3
+const val EDITED_TIME_ZONE_SEPARATOR = ":"
 
 fun getDefaultTimeZoneTitle(id: Int) = getAllTimeZones().firstOrNull { it.id == id }?.title ?: ""