Quotes / Invoicing

- Ability to manually mark a quote as invoiced (weird css fix for this, we can remove the custom css if we make the parent button just a dropdown, but don't want to introduce extra clicks)
- When converting a quote to an invoice, show the new invoice number in the quote history
- Quotes can now be sent from the main Send dropdown, instead of having to use the send button in the options menu / main quotes.php page

css/quote_dropdowns_fix.css

@@ -0,0 +1,15 @@
+/*!
+ * AdminLTE 3.2.0 Specific Dropdown Fix
+ * Targets .fix-quote-dropdown only
+ * Prevents alignment bugs in split button dropdowns going too far left
+ *  (ChatGPT)
+ */
+
+.fix-quote-dropdown .dropdown-menu {
+    left: auto !important;
+    right: 0 !important;
+    top: calc(100% + 0.25rem) !important;
+    transform: none !important;
+    min-width: max-content;
+    z-index: 1050;
+}