Some minor stuff reported by scrutinizer

Signed-off-by: emanuele <emanuele45@gmail.com>
Let's initialize subject_length in reloadSettings if needed

Signed-off-by: emanuele <emanuele45@gmail.com>
That is for @scripple :P (hook just after initialization of the theme)

Signed-off-by: emanuele <emanuele45@gmail.com>
sha256.js was one of the last js files not loaded with loadJavascriptFile

Signed-off-by: emanuele <emanuele45@gmail.com>