Fix small memory leaks

Mostly to make valgrind happy

src/widget/form/filesform.cpp

@@ -45,14 +45,9 @@ FilesForm::FilesForm()
 
 FilesForm::~FilesForm()
 {
-#if 0    
-    delete recvd; // docs claim this will clean up children
+    delete recvd;
     delete sent;
-    delete head;
-#endif
-    // having these lines caused a SIGABRT because free() received an invalid pointer
-    // but since this is only called on program shutdown anyways, 
-    // I'm not too bummed about removing it
+    head->deleteLater();
 }
 
 void FilesForm::show(Ui::MainWindow& ui)

src/widget/form/settings/identityform.cpp

@@ -74,6 +74,7 @@ IdentityForm::IdentityForm() :
 
 IdentityForm::~IdentityForm()
 {
+    delete bodyUI;
 }
 
 void IdentityForm::copyIdClicked()

src/widget/widget.cpp

@@ -285,6 +285,7 @@ Widget::~Widget()
     delete trayMenu;
     delete icon;
     delete ui;
+    delete translator;
     instance = nullptr;
 }