Attempt to unlock secretstorage keyring before returning lock state (#745)

src/vorta/keyring/abc.py

@@ -68,6 +68,7 @@ def is_primary(self):
     @property
     def is_unlocked(self):
         """
+        Try to unlock the keyring.
         Returns True if the keyring is open. Return False if it is closed or locked
         """
         raise NotImplementedError

src/vorta/keyring/kwallet.py

@@ -41,10 +41,10 @@ def get_result(self, method, args=[]):
 
     @property
     def is_unlocked(self):
-        self.get_handle()
+        self.try_unlock()
         return self.handle > 0
 
-    def get_handle(self):
+    def try_unlock(self):
         wallet_name = self.get_result("networkWallet")
         wId = QVariant(0)
         wId.convert(4)

src/vorta/keyring/secretstorage.py

@@ -46,7 +46,9 @@ def get_password(self, service, repo_url):
     def is_unlocked(self):
         try:
             collection = secretstorage.get_default_collection(self.connection)
-            return not collection.is_locked()
+            if collection.is_locked():  # Prompt for unlock
+                collection.unlock()
+            return not collection.is_locked()  # In case of denial
         except secretstorage.exceptions.SecretServiceNotAvailableException:
             logger.debug('SecretStorage is closed.')
             return False