Add Check and Change Password for an Account (#2861)

* Added new RPC endpoints to JSAPI (#2389)

* Added modal in Account Page to test & modify password (#2389)

* Modify hint with password change // Better tabs (#2556)

js/src/modals/PasswordManager/passwordManager.css

@@ -0,0 +1,73 @@
+/* Copyright 2015, 2016 Ethcore (UK) Ltd.
+/* This file is part of Parity.
+/*
+/* Parity is free software: you can redistribute it and/or modify
+/* it under the terms of the GNU General Public License as published by
+/* the Free Software Foundation, either version 3 of the License, or
+/* (at your option) any later version.
+/*
+/* Parity is distributed in the hope that it will be useful,
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+.accountContainer {
+  display: flex;
+  flex-direction: row;
+  margin-bottom: 1.5rem;
+}
+
+.accountInfos {
+  display: flex;
+  flex-direction: column;
+  justify-content: space-around;
+}
+
+.accountInfos > * {
+  margin: 0.25rem 0;
+}
+
+.hintLabel {
+  text-transform: uppercase;
+  font-size: 0.7rem;
+  margin-right: 0.5rem;
+}
+
+.accountAddress {
+  font-family: monospace;
+  font-size: 0.9rem;
+}
+
+.accountName {
+  font-size: 1.1rem;
+}
+
+.passwordHint {
+  font-size: 0.9rem;
+  color: lightgrey;
+}
+
+.message {
+  margin-top: 1rem;
+  width: 100%;
+  height: 2.5rem;
+  text-align: center;
+  line-height: 2.5rem;
+  transition: height 350ms 0 !important;
+  overflow: hidden;
+}
+
+.hideMessage {
+  height: 0;
+  background-color: transparent !important;
+}
+
+.form {
+  margin-top: 0;
+  padding: 0 0.5rem 1rem;
+  background-color: rgba(255, 255, 255, 0.05);
+}