core: fix help for jadx-gui, improve code
core: fix help for jadx-gui, improve code

sigma-random/jadx,tempbottle/jadx,bensonX/jadx,Carbs0126/jadx,jmue/jadx,banana42/jadx,thanatoskira/jadx,wskplho/jadx,xiaanming/jadx,lockerfish/jadx,Beabel2/jadx,NeoSpb/jadx,jpstotz/jadx,wangkang0627/jadx,homoSapiensSapiens/jadx,YASME-Tim/jadx,androidgilbert/jadx,bkerler/jadx,wangwangheng/jadx,abpolym/jadx,lpcdma/jadx,HarishB167/Project---2,cyberintruder/jadx,jingle1267/jadx,skylot/jadx