Different name for the square root (and other operations) block. I st…

…ruggled to figure out what to call this one, opted for the simplest approach which is just to include a subset of the options in it. Don't love this, but doing it for now until I can think of something better.

webapp/src/blocksSnippets.ts

@@ -461,7 +461,7 @@ function cachedBuiltinCategories(): pxt.Map<BuiltinCategoryDefinition> {
                     </block>`
                 }, {
                     name: "math_js_op",
-                    snippetName: "square root",
+                    snippetName: "sqrt | sin | cos | tan | ...",
                     attributes: {
                         blockId: "math_js_op",
                         weight: 81