Account namespace updates: part 4 (transfers, singular namespacing) (#896)

* Move Transfer to Account namespace

* Fix partial resolution due to namespacing plurality

* Make category and tag controllers consistent with namespacing convention

* Update stale partial reference

app/views/accounts/logos/show.svg.erb

@@ -1,21 +0,0 @@
-<svg
-  version="1.1"
-  xmlns="http://www.w3.org/2000/svg"
-  xmlns:xlink="http://www.w3.org/1999/xlink"
-  viewBox="0 0 32 32"
-  aria-hidden="true">
-  <g>
-    <rect width="100%" height="100%" rx="50%" fill="<%= accountable_color(@account.accountable_type) %>" opacity="0.1" />
-    <text
-      x="50%"
-      y="50%"
-      fill="<%= accountable_color(@account.accountable_type) %>"
-      text-anchor="middle"
-      dy="0.35em"
-      font-family="ui-sans-serif,system-ui,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji"
-      font-size="16"
-      font-weight="400">
-      <%= @account.name[0].upcase %>
-    </text>
-  </g>
-</svg>

app/views/accounts/new.html.erb

@@ -78,7 +78,7 @@
           <%= f.hidden_field :accountable_type %>
           <%= f.text_field :name, placeholder: t(".name.placeholder"), required: "required", label: t(".name.label"), autofocus: true %>
           <%= f.collection_select :institution_id, Current.family.institutions.alphabetically, :id, :name, { include_blank: t(".ungrouped"), label: t(".institution") } %>
-          <%= render "accounts/account/#{permitted_accountable_partial(@account.accountable_type)}", f: f %>
+          <%= render "accounts/accountables/#{permitted_accountable_partial(@account.accountable_type)}", f: f %>
           <%= f.money_field :balance_money, label: t(".balance"), required: "required" %>
 
           <div>