better decode error wording

react/src/components/dashboard/sendCoin/sendCoin.render.js

@@ -363,7 +363,12 @@ export const SendRender = function() {
                     <div>
                       <strong className="text-capitalize">{ translate('API.ERROR_SM') }</strong>
                     </div>
-                    <div>{ this.state.lastSendToResponse.result }</div>
+                    { (this.state.lastSendToResponse.result.toLowerCase().indexOf('decode error') > -1) &&
+                      <div>Your history contains shielded transactions(z).<br />Please move funds to another transparent address in order to use Lite mode.</div>
+                    }
+                    { this.state.lastSendToResponse.result.toLowerCase().indexOf('decode error') === -1 &&
+                      <div>{ this.state.lastSendToResponse.result }</div>
+                    }
                     { this.props.ActiveCoin.mode === 'spv' &&
                       this.state.lastSendToResponse.raw &&
                       this.state.lastSendToResponse.raw.txid &&

react/src/components/login/login.render.js

@@ -201,8 +201,7 @@ const LoginRender = function() {
             <button
               type="button"
               className="btn btn-primary btn-block margin-top-20"
-              onClick={ this.loginSeed }
-              disabled={ !this.state.loginPassphrase || !this.state.loginPassphrase.length }>
+              onClick={ this.loginSeed }>
               { translate('INDEX.SIGN_IN') }
             </button>
             <div className="form-group form-material floating">