fix(devtools): don't round decimal vals previews in the state serializer

The actual numerical data can only be checked in the prop edit mode. This fixes that and makes the real value visible all the time.

devtools/projects/ng-devtools-backend/src/lib/state-serializer/serialized-descriptor-factory.ts

@@ -60,7 +60,7 @@ const typeToDescriptorPreview: Formatter<string> = {
   [PropType.Function]: (prop: Function) => `${prop.name}(...)`,
   [PropType.HTMLNode]: (prop: Node) => prop.constructor.name,
   [PropType.Null]: (_: null) => 'null',
-  [PropType.Number]: (prop: any) => parseInt(prop, 10).toString(),
+  [PropType.Number]: (prop: any) => prop.toString(),
   [PropType.Object]: (prop: Object) => (getKeys(prop).length > 0 ? '{...}' : '{}'),
   [PropType.Symbol]: (symbol: symbol) => `Symbol(${symbol.description})`,
   [PropType.Undefined]: (_: undefined) => 'undefined',

devtools/projects/ng-devtools-backend/src/lib/state-serializer/state-serializer.spec.ts

@@ -51,6 +51,7 @@ const QUERY_1_2 = [
 
 const dir1 = {
   one: 1,
+  pi: 3.14159,
   nested: {
     arr: [
       {
@@ -95,6 +96,14 @@ describe('deeplySerializeSelectedProperties', () => {
         value: 1,
         containerType: null,
       },
+      pi: {
+        type: PropType.Number,
+        expandable: false,
+        editable: true,
+        preview: '3.14159',
+        value: 3.14159,
+        containerType: null,
+      },
       nested: {
         type: PropType.Object,
         editable: false,
@@ -125,6 +134,14 @@ describe('deeplySerializeSelectedProperties', () => {
         value: 1,
         containerType: null,
       },
+      pi: {
+        type: PropType.Number,
+        expandable: false,
+        editable: true,
+        preview: '3.14159',
+        value: 3.14159,
+        containerType: null,
+      },
       nested: {
         type: PropType.Object,
         editable: false,