Add setting to config dist
Make stack panel switchable
Make 'select from stack' button switchable
Make 'place on stack' button switchable
Add sniff to check variable naming
Merge pull request #2341 from rarila/variable-name-sniff

Add sniff to check variable naming
rename "general/interface/…" to "general/backend/…"
Update changelog
Merge pull request #2340 from rarila/stack-disable

Option to disable stack usage
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Variable naming: $new_config => $newConfig
Variable naming: $a_val => $aVal
Variable naming: $b_val => $bVal
Variable naming: $route_params => $routeParams
Variable naming: $num_args => $numArgs
Variable naming: $on_secondary => $onSecondary
Variable naming: $stack_items => $stackItems
Variable naming: $low_subject => $lowSubject