fix(grid): rename iconNames in custom filtering operands demos (#3620)

Author: teodosiah

src/app/grid/grid-custom-filtering/grid-custom-filtering.component.ts

@@ -33,7 +33,7 @@ export class CaseSensitiveFilteringOperand extends IgxStringFilteringOperand {
         super();
         const customOperations = [
             {
-                iconName: 'contains',
+                iconName: 'filter_contains',
                 isUnary: false,
                 logic: (target: string, searchVal: string, ignoreCase?: boolean) => {
                     ignoreCase = false;
@@ -44,7 +44,7 @@ export class CaseSensitiveFilteringOperand extends IgxStringFilteringOperand {
                 name: 'Contains (case sensitive)'
             },
             {
-                iconName: 'does-not-contain',
+                iconName: 'filter_does_not_contain',
                 isUnary: false,
                 logic: (target: string, searchVal: string, ignoreCase?: boolean) => {
                     ignoreCase = false;

src/app/hierarchical-grid/hierarchical-grid-filtering/hierarchical-grid-custom-filtering.component.ts

@@ -28,7 +28,7 @@ export class CaseSensitiveFilteringOperand extends IgxStringFilteringOperand {
         super();
         const customOperations = [
             {
-                iconName: 'contains',
+                iconName: 'filter_contains',
                 isUnary: false,
                 logic: (target: string, searchVal: string, ignoreCase?: boolean) => {
                     ignoreCase = false;
@@ -39,7 +39,7 @@ export class CaseSensitiveFilteringOperand extends IgxStringFilteringOperand {
                 name: 'Contains (case sensitive)'
             },
             {
-                iconName: 'does-not-contain',
+                iconName: 'filter_does_not_contain',
                 isUnary: false,
                 logic: (target: string, searchVal: string, ignoreCase?: boolean) => {
                     ignoreCase = false;

src/app/tree-grid/tree-grid-filtering-custom-sample/tree-grid-filtering-custom-sample.component.ts

@@ -35,7 +35,7 @@ export class CaseSensitiveFilteringOperand extends IgxStringFilteringOperand {
         super();
         const customOperations = [
             {
-                iconName: 'contains',
+                iconName: 'filter_contains',
                 isUnary: false,
                 logic: (target: string, searchVal: string, ignoreCase?: boolean) => {
                     ignoreCase = false;
@@ -46,7 +46,7 @@ export class CaseSensitiveFilteringOperand extends IgxStringFilteringOperand {
                 name: 'Contains (case sensitive)'
             },
             {
-                iconName: 'does-not-contain',
+                iconName: 'filter_does_not_contain',
                 isUnary: false,
                 logic: (target: string, searchVal: string, ignoreCase?: boolean) => {
                     ignoreCase = false;