templates: Add missing translation tags.

Several of these were found via an audit by Tim Abbott.

web/templates/buddy_list/view_all_subscribers.hbs

@@ -1 +1 @@
-<a class="view-all-subscribers-link" href="{{stream_edit_hash}}">View all subscribers</a>
+<a class="view-all-subscribers-link" href="{{stream_edit_hash}}">{{t "View all subscribers" }}</a>

web/templates/buddy_list/view_all_users.hbs

@@ -1 +1 @@
-<a class="view-all-users-link" href="#organization/user-list-admin">View all users</a>
+<a class="view-all-users-link" href="#organization/user-list-admin">{{t "View all users" }}</a>

web/templates/draft_table_body.hbs

@@ -37,7 +37,7 @@
                     {{/each}}
                 </div>
                 <div id="other-drafts">
-                    <h2 id="other-drafts-header">Other drafts</h2>
+                    <h2 id="other-drafts-header">{{t "Other drafts" }}</h2>
                     {{#each other_drafts}}
                         {{> draft}}
                     {{/each}}

web/templates/login_to_view_image_button.hbs

@@ -1,6 +1,6 @@
 <div class="spectator_login_for_image_button">
     <a class="login_button color_animated_button" href="/login/">
         <i class='zulip-icon zulip-icon-log-in'></i>
-        <span>Log in to view image</span>
+        <span>{{t "Log in to view image" }}</span>
     </a>
 </div>

web/templates/settings/add_new_bot_form.hbs

@@ -60,7 +60,7 @@
             {{/each}}
         </div>
         <div class="input-group">
-            <label for="bot_avatar_file_input">Avatar</label>
+            <label for="bot_avatar_file_input">{{t "Avatar" }}</label>
             <div id="bot_avatar_file"></div>
             <input type="file" name="bot_avatar_file_input" class="notvisible" id="bot_avatar_file_input" value="{{t 'Upload avatar' }}" />
             <div id="add_bot_preview_text">

web/templates/settings/admin_emoji_list.hbs

@@ -14,7 +14,7 @@
         {{#if author}}
         <span class="emoji_author">{{author.full_name}}</span>
         {{else}}
-        <span class="emoji_author">Unknown author</span>
+        <span class="emoji_author">{{t "Unknown author" }}</span>
         {{/if}}
     </td>
     <td>

web/templates/settings/edit_bot_form.hbs

@@ -29,7 +29,7 @@
         <div id="service_data">
         </div>
         <div class="input-group edit-avatar-section">
-            <label>Avatar</label>
+            <label>{{t "Avatar" }}</label>
             {{!-- Shows the current avatar --}}
             <img src="{{bot_avatar_url}}" id="current_bot_avatar_image" />
             <input type="file" name="bot_avatar_file_input" class="notvisible edit_bot_avatar_file_input" value="{{t 'Upload profile picture' }}" />