Enforce minimum width on header dropdown.

The header dropdown menu's horizontal positioning depends on the
width of the user pfp/username/currency region to not overflow off
the right side of the page. Therefore, we enforce a minimum width.

There is presumably some way to fix this by right-aligning the right
side of the dropdown menu to the right side of the dropdown header.
I didn't want to risk it given the strange interplay of all of the
Bootstrap styling and the media queries. Also, it does visually
look better to be left-aligned.

files/templates/header.html

@@ -158,7 +158,7 @@
 				</li>
 			
 				<li class="nav-item d-flex align-items-center justify-content-center text-center">
-					<div class="dropdown">
+					<div class="dropdown" id="header--dropdown">
 						<a class="nav-link bg-transparent py-0 pr-0" role="button" id="dropdownMenuLink" data-bs-toggle="dropdown"
 						aria-haspopup="true" aria-expanded="false">
 						<div class="d-flex">
@@ -177,7 +177,7 @@
 							</div>
 						</div>
 					</a>
-					<div class="dropdown-menu dropdown-menu-right dropdown-menu-lg-left shadow fade px-0">
+					<div class="dropdown-menu dropdown-menu-right dropdown-menu-lg-left shadow fade px-0" id="header--dropdown-menu">
 					<div class="px-2">
 						<a class="dropdown-item" href="{{v.url}}"><i class="fas fa-user-circle fa-fw mr-3"></i>My
 							profile</a>

files/templates/util/assetcache.html

@@ -1,6 +1,6 @@
 {%-
 set CACHE_VER = {
-	'css/main.css': 365,
+	'css/main.css': 366,
 
 	'css/4chan.css': 61,
 	'css/classic.css': 61,