Add Estonian (credit: @indasin)

locales/en.json

@@ -4,7 +4,7 @@
   "electron_translate_1": "Show Qortal UI",
   "electron_translate_2": "Quit",
   "electron_translate_3": "Update available",
-  "electron_translate_4": "A new Qortal UI version is available. You want to download it ?",
+  "electron_translate_4": "A new Qortal UI version is available. Do you want to download it?",
   "electron_translate_5": "INSTALL NOW",
   "electron_translate_6": "MAYBE LATER",
   "electron_translate_7": "Update ready to install",
@@ -43,6 +43,6 @@
   "electron_translate_40": "Actual Size",
   "electron_translate_41": "Toggle Full Screen",
   "electron_translate_42": "New UI Instance",
-  "electron_translate_43": "Checking for update !",
-  "electron_translate_44": "UI is checking in background if a new version is available and download it."
+  "electron_translate_43": "Checking for update!",
+  "electron_translate_44": "UI is checking in the background for a new version to download."
 }

locales/es.json

@@ -45,4 +45,4 @@
   "electron_translate_42": "Nueva instancia de UI",
   "electron_translate_43": "¡Buscando actualizaciones!",
   "electron_translate_44": "La interfaz de usuario está verificando en segundo plano si hay una nueva versión disponible y descárgala."
-}
+}

locales/et.json

@@ -42,5 +42,7 @@
   "electron_translate_39": "Vähenda",
   "electron_translate_40": "Tegelik suurus",
   "electron_translate_41": "Lülitage täisekraan sisse",
-  "electron_translate_42": "Uus KL eksemplar"
-}
+  "electron_translate_42": "Uus KL eksemplar",
+  "electron_translate_43": "Värskenduste otsimine!",
+  "electron_translate_44": "KL kontrollib taustal, kas uus versioon on saadaval, ja laadib selle alla."
+}

locales/jp.json

@@ -45,4 +45,4 @@
   "electron_translate_42": "新しい UI インスタンス",
   "electron_translate_43": "アップデートをチェックしています!",
   "electron_translate_44": "新しいバージョンが利用可能かどうかを UI がバックグラウンドでチェックしており、ダウンロードします。"
-}
+}