Core: Add some sanity check that settings containers don't auto-apply

We use manual 'Apply' in the dialog.

Also, mark a few pages as non-autoapply that were recently changed
away from PagedSettings again which did that autmatically.

Change-Id: Id78cac2770658b18c420813802a0e77443329f39
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/fakevim/fakevimactions.cpp

@@ -53,6 +53,8 @@ FakeVimSettings &settings()
 
 FakeVimSettings::FakeVimSettings()
 {
+    setAutoApply(false);
+
     setup(&useFakeVim,     false, "UseFakeVim",     {},    Tr::tr("Use FakeVim"));
 
     // Specific FakeVim settings