Documentation for submit button

docs/en/UI/Blazor/Components/SubmitButton.md

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+# Blazor UI: SubmitButton component
+
+`SubmitButton` is a simple wrapper around `Button` component. It is used to be placed inside of page Form or Modal dialogs where it can response to user actions and to be activated as a default button by pressing an ENTER key. Once clicked it will go into the `disabled` state and also it will show a small loading indicator until clicked event is finished.
+
+## Quick Example
+
+```html
+<SubmitButton Clicked="@YourSaveOperation" />
+```
+
+Notice that we didn't specify any text, like `Save Changes`. This is because `SubmitButton` will by default pull text from the localization. If you want to change that you either specify a localization key or you can add custom content.
+
+### With localization key
+
+```html
+<SubmitButton Clicked="@YourSaveOperation" SaveResourceKey="YourSaveName" />
+```
+
+### With custom content
+
+```html
+<SubmitButton Clicked="@YourSaveOperation">
+    @L["Save"]
+</SubmitButton>
+```