Do not cache the seed, retrieve it from the decrypted wallet

app/scripts/lib/config-manager.js

@@ -88,20 +88,16 @@ ConfigManager.prototype.getWallet = function() {
   return this.migrator.getData().wallet
 }
 
-ConfigManager.prototype.getSeedWords = function() {
-  return this.migrator.getData().seedWords
-}
-
-ConfigManager.prototype.setSeedWords = function(seedWords) {
+// Takes a boolean
+ConfigManager.prototype.setShowSeedWords = function(should) {
   var data = this.migrator.getData()
-  data.seedWords = seedWords
+  data.showSeedWords = should
   this.setData(data)
 }
 
-ConfigManager.prototype.clearSeedWords = function() {
+ConfigManager.prototype.getShouldShowSeedWords = function() {
   var data = this.migrator.getData()
-  delete data.seedWords
-  this.setData(data)
+  return data.showSeedWords
 }
 
 ConfigManager.prototype.getCurrentRpcAddress = function() {

app/scripts/lib/idStore.js

@@ -45,11 +45,13 @@ IdentityStore.prototype.createNewVault = function(password, entropy, cb){
   configManager.clearWallet()
   this._createIdmgmt(password, null, entropy, (err) => {
     if (err) return cb(err)
-    var seedWords = this._idmgmt.getSeed()
-    configManager.setSeedWords(seedWords)
+
     this._loadIdentities()
     this._didUpdate()
     this._autoFaucet()
+
+    configManager.setShowSeedWords(true)
+    var seedWords = this._idmgmt.getSeed()
     cb(null, seedWords)
   })
 }
@@ -69,20 +71,28 @@ IdentityStore.prototype.setStore = function(store){
 }
 
 IdentityStore.prototype.clearSeedWordCache = function(cb) {
-  configManager.clearSeedWords()
+  configManager.setShowSeedWords(false)
   cb()
 }
 
 IdentityStore.prototype.getState = function(){
-  const cachedSeeds = configManager.getSeedWords()
+  var seedWords = this.getSeedIfUnlocked()
   var wallet = configManager.getWallet()
   return clone(extend(this._currentState, {
-    isInitialized: !!configManager.getWallet() && !cachedSeeds,
+    isInitialized: !!configManager.getWallet() && !seedWords,
     isUnlocked: this._isUnlocked(),
-    seedWords: cachedSeeds,
+    seedWords: seedWords,
   }))
 }
 
+IdentityStore.prototype.getSeedIfUnlocked = function() {
+  var showSeed = configManager.getShouldShowSeedWords()
+  var idmgmt = this._idmgmt
+  var shouldShow = showSeed && !!idmgmt
+  var seedWords = shouldShow ? idmgmt.getSeed() : null
+  return seedWords
+}
+
 IdentityStore.prototype.getSelectedAddress = function(){
   return this._currentState.selectedAddress
 }