Waking pc from sleep or hibernation when OpenLP was running results in traceback

[Azaziah]

When Win 10 is waken from hibernation/sleep.

This happens sometimes, not always.

Trunk 2696

Traceback (most recent call last):
  File "site-packages\sqlalchemy\engine\base.py", line 2074, in _wrap_pool_connect
  File "site-packages\sqlalchemy\pool.py", line 376, in connect
  File "site-packages\sqlalchemy\pool.py", line 713, in _checkout
  File "site-packages\sqlalchemy\pool.py", line 480, in checkout
  File "site-packages\sqlalchemy\pool.py", line 1151, in _do_get
  File "site-packages\sqlalchemy\pool.py", line 323, in _create_connection
  File "site-packages\sqlalchemy\pool.py", line 449, in __init__
  File "site-packages\sqlalchemy\pool.py", line 607, in __connect
  File "site-packages\sqlalchemy\engine\strategies.py", line 97, in connect
  File "site-packages\sqlalchemy\engine\default.py", line 385, in connect
sqlite3.OperationalError: unable to open database file

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "openlp\core\lib\db.py", line 252, in __init__
  File "openlp\plugins\alerts\lib\db.py", line 54, in init_schema
  File "site-packages\sqlalchemy\sql\schema.py", line 3695, in create_all
  File "site-packages\sqlalchemy\engine\base.py", line 1855, in _run_visitor
  File "contextlib.py", line 59, in __enter__
  File "site-packages\sqlalchemy\engine\base.py", line 1848, in _optional_conn_ctx_manager
  File "site-packages\sqlalchemy\engine\base.py", line 2039, in contextual_connect
  File "site-packages\sqlalchemy\engine\base.py", line 2078, in _wrap_pool_connect
  File "site-packages\sqlalchemy\engine\base.py", line 1405, in _handle_dbapi_exception_noconnection
  File "site-packages\sqlalchemy\util\compat.py", line 189, in raise_from_cause
  File "site-packages\sqlalchemy\util\compat.py", line 182, in reraise
  File "site-packages\sqlalchemy\engine\base.py", line 2074, in _wrap_pool_connect
  File "site-packages\sqlalchemy\pool.py", line 376, in connect
  File "site-packages\sqlalchemy\pool.py", line 713, in _checkout
  File "site-packages\sqlalchemy\pool.py", line 480, in checkout
  File "site-packages\sqlalchemy\pool.py", line 1151, in _do_get
  File "site-packages\sqlalchemy\pool.py", line 323, in _create_connection
  File "site-packages\sqlalchemy\pool.py", line 449, in __init__
  File "site-packages\sqlalchemy\pool.py", line 607, in __connect
  File "site-packages\sqlalchemy\engine\strategies.py", line 97, in connect
  File "site-packages\sqlalchemy\engine\default.py", line 385, in connect
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) unable to open database file

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "openlp\core\lib\screen.py", line 96, in screen_resolution_changed
  File "openlp\core\common\registry.py", line 137, in execute
  File "openlp\core\ui\mainwindow.py", line 1065, in screen_changed
  File "openlp\core\lib\renderer.py", line 81, in update_display
AttributeError: 'Renderer' object has no attribute 'display'