Bugfix: Dashboard - Difficulty adjustment component. (#663)

* Add color to previous retarget.
Add absolute number pipe.
Change plus and minus signs to fa icons.
Change Fee Estimate title to Transactions Fees.
Set min and max difficulty adjustments.

* Add projectID to cypress conf.

* Change icon to fa-caret.

* Remove unecessary icons.

frontend/src/app/shared/pipes/absolute/absolute.pipe.spec.ts

@@ -0,0 +1,8 @@
+import { AbsolutePipe } from './absolute.pipe';
+
+describe('AbsolutePipe', () => {
+  it('create an instance', () => {
+    const pipe = new AbsolutePipe();
+    expect(pipe).toBeTruthy();
+  });
+});

frontend/src/app/shared/pipes/absolute/absolute.pipe.ts

@@ -0,0 +1,8 @@
+import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({ name: 'absolute' })
+export class AbsolutePipe implements PipeTransform {
+  transform(nr: number) {
+    return Math.abs(nr);
+  }
+}