style(issue-panel): change icon from dashboard_customize to webhook

Avoids visual confusion with the boards icon (grid_view).

src/app/core-ui/main-header/desktop-panel-buttons/desktop-panel-buttons.component.ts

@@ -43,7 +43,7 @@ import { GlobalConfigService } from '../../../features/config/global-config.serv
           kb()?.toggleIssuePanel ? '[' + kb()?.toggleIssuePanel + ']' : ''
         }}"
       >
-        <mat-icon>dashboard_customize</mat-icon>
+        <mat-icon>webhook</mat-icon>
       </button>
     }
 

src/app/core-ui/main-header/mobile-side-panel-menu/mobile-side-panel-menu.component.ts

@@ -90,7 +90,7 @@ import { BreakpointObserver } from '@angular/cdk/layout';
           (click)="toggleIssuePanel()"
           [matTooltip]="T.MH.TOGGLE_SHOW_ISSUE_PANEL | translate"
         >
-          <mat-icon>dashboard_customize</mat-icon>
+          <mat-icon>webhook</mat-icon>
         </button>
 
         <!-- Notes -->

src/app/core-ui/mobile-bottom-nav/mobile-bottom-nav.component.html

@@ -73,7 +73,7 @@
     [class.active]="isShowIssuePanel()"
     (click)="toggleIssuePanel()"
   >
-    <mat-icon>dashboard_customize</mat-icon>
+    <mat-icon>webhook</mat-icon>
     <span>{{ T.BN.SHOW_ISSUE_PANEL | translate }}</span>
   </button>
 

src/app/features/config/form-cfgs/app-features-form.const.ts

@@ -58,7 +58,7 @@ export const APP_FEATURES_FORM_CFG: ConfigFormSection<AppFeaturesConfig> = {
       type: 'slide-toggle',
       templateOptions: {
         label: T.GCF.APP_FEATURES.ISSUES_PANEL,
-        icon: 'dashboard_customize',
+        icon: 'webhook',
       },
     },
     {