fix(grid): rebind summaryTemplate dynamically

Author: mmart1n

projects/igniteui-angular/src/lib/grids/columns/column.component.ts

@@ -1124,7 +1124,7 @@ export class IgxColumnComponent implements AfterContentInit, OnDestroy, ColumnTy
      */
     @notifyChanges()
     @WatchColumnChanges()
-    @Input('summaryTemplate')
+    @Input()
     public get summaryTemplate(): TemplateRef<any> {
         return this._summaryTemplate;
     }

projects/igniteui-angular/src/lib/grids/summaries/summary-cell.component.html

@@ -1,5 +1,5 @@
 <ng-container *ngIf="hasSummary">
-    <ng-container *ngTemplateOutlet="column.summaryTemplate ? column.summaryTemplate : defaultSummary; context: { $implicit: summaryResults }">
+    <ng-container *ngTemplateOutlet="summaryTemplate ? summaryTemplate : defaultSummary; context: { $implicit: summaryResults }">
     </ng-container>
 </ng-container>
     <ng-template #defaultSummary>

projects/igniteui-angular/src/lib/grids/summaries/summary-cell.component.ts

@@ -1,4 +1,4 @@
-import { Component, Input, HostBinding, HostListener, ChangeDetectionStrategy, ElementRef } from '@angular/core';
+import { Component, Input, HostBinding, HostListener, ChangeDetectionStrategy, ElementRef, TemplateRef } from '@angular/core';
 import {
     IgxSummaryOperand,
     IgxSummaryResult
@@ -33,6 +33,9 @@ export class IgxSummaryCellComponent {
     @Input()
     public summaryFormatter: (summaryResult: IgxSummaryResult, summaryOperand: IgxSummaryOperand) => any;
 
+    @Input()
+    public summaryTemplate: TemplateRef<any>;
+
     /** @hidden */
     @Input()
     @HostBinding('class.igx-grid-summary--active')

projects/igniteui-angular/src/lib/grids/summaries/summary-row.component.html

@@ -23,6 +23,7 @@
             [rowIndex]="index"
             [firstCellIndentation]="firstCellIndentation"
             [summaryResults]="getColumnSummaries(col.field)"
+            [summaryTemplate]="col.summaryTemplate"
             [hasSummary]="col.hasSummary"
             [density]="grid.displayDensity"
             [summaryFormatter]="col.summaryFormatter"
@@ -53,6 +54,7 @@
             [firstCellIndentation]="firstCellIndentation"
             [rowIndex]="index"
             [summaryResults]="getColumnSummaries(col.field)"
+            [summaryTemplate]="col.summaryTemplate"
             [hasSummary]="col.hasSummary"
             [density]="grid.displayDensity"
             [active]="isCellActive(col.visibleIndex)"