[BUG]Internal message toggle doesn't check toggle state

[sebkuip]

In logviewer, the toggle for internal messages only calls a function, and doesn't check the state of the toggle. This can lead to situations where the state of showing internal messages and the toggle state are not correctly showing. This for instance happens when internal messages were on, you click on an image within the thread, then use your browser's "back" function to go back to the transcript. This causes internal messages to be off, but the toggle remains on.