Rename budget to transaction for new-transaction

web/budget.html

@@ -9,7 +9,7 @@
 {{define "main"}}
 <div class="container"><a href="/budget/{{.Budget.ID}}/accounts">Go to Accounts</a></div>
 <div class="budget-item">
-    <a href="#newbudgetmodal" data-toggle="modal" data-target="#newbudgetmodal">New Budget</a>
+    <a href="#newtransactionmodal" data-toggle="modal" data-target="#newtransactionmodal">New Transaction</a>
     <span class="time"></span>
 </div>
 <table class="container col-lg-12" id="content">