Bug 1797107 - Make the Feed and News subscribe dialog fit for the modern flexbox emulation. r=aleca

Differential Revision: https://phabricator.services.mozilla.com/D160066

--HG--
extra : moz-landing-system : lando

mail/themes/shared/mail/feedSubscribe.css

@@ -2,9 +2,9 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#subscriptionsDialog {
-  width: 60em;
-  height: 40em;
+#feedSubscriptions {
+  min-width: 60em;
+  min-height: 40em;
 }
 
 #rssSubscriptionsList > treechildren::-moz-tree-image {
@@ -35,7 +35,7 @@
 }
 
 #autotagPrefix {
-  flex: 0;
+  max-width: 15em;
 }
 
 #statusContainerBox {

mail/themes/shared/mail/subscribe.css

@@ -8,6 +8,11 @@
 
 @import url("chrome://messenger/skin/messenger.css");
 
+#subscribeWindow {
+  min-width: 40em;
+  min-height: 30em;
+}
+
 #nameColumn,
 #nameColumn2 {
   -moz-box-flex: 10;

mail/themes/shared/mail/themeableDialog.css

@@ -313,8 +313,6 @@ menulist::part(dropmarker) {
 }
 
 menulist::part(dropmarker-icon) {
-  width: 16px;
-  height: 16px;
   -moz-context-properties: stroke;
   stroke: currentColor;
 }

mailnews/base/content/subscribe.xhtml

@@ -16,7 +16,6 @@
       xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
       xmlns:html="http://www.w3.org/1999/xhtml"
       persist="width height screenX screenY"
-      width="645" height="484"
       lightweightthemes="true"
       windowtype="mailnews:subscribe"
       scrolling="false">
@@ -33,7 +32,7 @@
   <stringbundle id="bundle_subscribe" src="chrome://messenger/locale/subscribe.properties"/>
   <stringbundle id="bundle_messenger" src="chrome://messenger/locale/messenger.properties"/>
 
-  <vbox flex="1" style="width: 40em; height: 25em;">
+  <vbox flex="1">
     <hbox>
       <vbox>
         <hbox pack="end" align="center" flex="1">