Toggle datatypes visibility (#366)

* showDatatype setting added in view control panel

* removed shortcut

can be discussed later

* fixed linting issue and made sure the condition check is above div element

in table.jsx code
in the else part im directly returning the element by keeping a check  for settings.showDataTypes?
which helps to not add empty element

for setSetting issue
I used the similar code used just above the snippet and modified it

src/i18n/locales/en.js

@@ -49,6 +49,7 @@ const en = {
     field_details: "Field details",
     reset_view: "Reset view",
     show_grid: "Show grid",
+    show_datatype: "Show datatype",
     show_cardinality: "Show cardinality",
     theme: "Theme",
     light: "Light",