Add Qt UI form spacing in editorconfig

.editorconfig

@@ -53,3 +53,7 @@ indent_size = 2
 [{*.zsh,.*.zsh,build-aux/.functions/*,.github/scripts/utils.zsh/*}]
 indent_style = space
 indent_size = 2
+
+[*.ui]
+indent_style = space
+indent_size = 1