[FIX] board: correctly handle invalid actions
[FIX] board: correctly handle invalid actions

This may happen when a dashboard contain references to deleted actions.

datenbetrieb/odoo,leorochael/odoo,Nowheresly/odoo,odootr/odoo,Nowheresly/odoo,synconics/odoo,makinacorpus/odoo,spadae22/odoo,diagramsoftware/odoo,bplancher/odoo,diagramsoftware/odoo,spadae22/odoo,synconics/odoo,hip-odoo/odoo,makinacorpus/odoo,leorochael/odoo,NeovaHealth/odoo,Nowheresly/odoo,CatsAndDogsbvba/odoo,hip-odoo/odoo,Adel-Magebinary/odoo,odootr/odoo,diagramsoftware/odoo,vnsofthe/odoo,OpenUpgrade/OpenUpgrade,glovebx/odoo,datenbetrieb/odoo,NeovaHealth/odoo,bplancher/odoo,ygol/odoo,alexcuellar/odoo,ygol/odoo,datenbetrieb/odoo,odootr/odoo,makinacorpus/odoo,diagramsoftware/odoo,Daniel-CA/odoo,Daniel-CA/odoo,alexcuellar/odoo,bplancher/odoo,alexcuellar/odoo,alexcuellar/odoo,Elico-Corp/odoo_OCB,ygol/odoo,Daniel-CA/odoo,Adel-Magebinary/odoo,OpenUpgrade/OpenUpgrade,synconics/odoo,funkring/fdoo,OpenUpgrade/OpenUpgrade,odootr/odoo,leorochael/odoo,tvibliani/odoo,hip-odoo/odoo,vnsofthe/odoo,Daniel-CA/odoo,glovebx/odoo,synconics/odoo,spadae22/odoo,glovebx/odoo,ygol/odoo,odootr/odoo,CatsAndDogsbvba/odoo,hip-odoo/odoo,leorochael/odoo,synconics/odoo,tvibliani/odoo,Daniel-CA/odoo,odootr/odoo,Adel-Magebinary/odoo,bplancher/odoo,glovebx/odoo,spadae22/odoo,leorochael/odoo,OpenUpgrade/OpenUpgrade,funkring/fdoo,funkring/fdoo,spadae22/odoo,glovebx/odoo,Elico-Corp/odoo_OCB,OpenUpgrade/OpenUpgrade,ygol/odoo,makinacorpus/odoo,Elico-Corp/odoo_OCB,leorochael/odoo,NeovaHealth/odoo,datenbetrieb/odoo,tvibliani/odoo,NeovaHealth/odoo,funkring/fdoo,Nowheresly/odoo,tvibliani/odoo,tvibliani/odoo,Elico-Corp/odoo_OCB,alexcuellar/odoo,Nowheresly/odoo,CatsAndDogsbvba/odoo,Daniel-CA/odoo,ygol/odoo,OpenUpgrade/OpenUpgrade,alexcuellar/odoo,datenbetrieb/odoo,Adel-Magebinary/odoo,Adel-Magebinary/odoo,vnsofthe/odoo,alexcuellar/odoo,funkring/fdoo,Adel-Magebinary/odoo,diagramsoftware/odoo,CatsAndDogsbvba/odoo,makinacorpus/odoo,funkring/fdoo,odootr/odoo,synconics/odoo,glovebx/odoo,glovebx/odoo,vnsofthe/odoo,Elico-Corp/odoo_OCB,tvibliani/odoo,spadae22/odoo,synconics/odoo,NeovaHealth/odoo,tvibliani/odoo,funkring/fdoo,spadae22/odoo,CatsAndDogsbvba/odoo,CatsAndDogsbvba/odoo,NeovaHealth/odoo,vnsofthe/odoo,vnsofthe/odoo,ygol/odoo,bplancher/odoo,Daniel-CA/odoo,bplancher/odoo,diagramsoftware/odoo,hip-odoo/odoo,CatsAndDogsbvba/odoo,OpenUpgrade/OpenUpgrade,Elico-Corp/odoo_OCB,vnsofthe/odoo,NeovaHealth/odoo,leorochael/odoo,datenbetrieb/odoo,hip-odoo/odoo,Adel-Magebinary/odoo,Nowheresly/odoo,makinacorpus/odoo,Nowheresly/odoo,diagramsoftware/odoo,datenbetrieb/odoo,makinacorpus/odoo