Search box text updated.

BTC ticker fix.
Dropdown color fix.
Miner button tooltip.

frontend/src/app/app.module.ts

@@ -3,7 +3,7 @@ import { NgModule } from '@angular/core';
 import { HttpClientModule } from '@angular/common/http';
 import { ReactiveFormsModule } from '@angular/forms';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
-import { NgbButtonsModule } from '@ng-bootstrap/ng-bootstrap';
+import { NgbButtonsModule, NgbTooltipModule } from '@ng-bootstrap/ng-bootstrap';
 import { InfiniteScrollModule } from 'ngx-infinite-scroll';
 
 import { AppRoutingModule } from './app-routing.module';
@@ -98,6 +98,7 @@ import { MinerComponent } from './pipes/miner/miner.component';
     ReactiveFormsModule,
     BrowserAnimationsModule,
     NgbButtonsModule,
+    NgbTooltipModule,
     InfiniteScrollModule,
   ],
   providers: [