refactor: angular material components export from common module & feat: css helper classes added (#57)

* angular material export in common module

* css helper class added

src/app/clients/clients.module.ts

@@ -1,7 +1,10 @@
 import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
 import { CommonModule } from '@angular/common';
+import {Component, OnInit, ViewChild} from '@angular/core';
 
 import { ArchwizardModule } from 'angular-archwizard';
+import { CoreModule } from '../core/core.module';
+import {MatTableModule} from '@angular/material/table';
 
 import { ClientsRoutingModule } from './clients-routing.module';
 import { ClientsComponent } from './clients.component';
@@ -11,9 +14,10 @@ import { ViewLoanComponent } from './view-loan/view-loan.component';
 
 @NgModule({
   imports: [
+    CoreModule,
     CommonModule,
     ClientsRoutingModule,
-    ArchwizardModule
+    ArchwizardModule,
   ],
   declarations: [
     ClientsComponent,