[UI] Slide download and view (hedyorg#4023)

**Description**

Adds a new table to the for teachers page, where teachers can see slides and also download them.

![image](https://user-images.githubusercontent.com/45865185/217730375-2a620226-9043-44e3-b634-a8c1af8911d1.png)

The zip with the slides has the following structure according to the Slides.com format:

* A lib folder, that's empty, since Slides.com ignores our css and javascript anyways.
* A folder with the same name as the zip, empty because there are no images in our slides.
* A index.html files where `iframes` are changed by anchor tags, since they are not imported correctly to slides.com.

An example of the import can be found here https://slides.com/jesuspelay/deck-e2545a/fullscreen

**Fixes hedyorg#3924**


**How to test**

* If this is a UI change: _describe how to run your code to see it in action. See this hedyorg#880 (comment) for an example_
* If this is a language change: _add a few tests showing the difference_

**Checklist**
Done? Check if you have it all in place using this list:*
  
- [ ] Contains one of the PR categories in the name
- [ ] Describes changes in the format above
- [ ] Links to an existing issue or discussion 
- [ ] Has a "How to test" section

If you're unsure about any of these, don't hesitate to ask. We're here to help!

messages.pot

@@ -8,14 +8,14 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2023-01-17 13:16-0400\n"
+"POT-Creation-Date: 2023-02-15 16:58-0400\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <[email protected]>\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"Generated-By: Babel 2.9.1\n"
+"Generated-By: Babel 2.11.0\n"
 
 msgid "program_contains_error"
 msgstr ""
@@ -326,12 +326,15 @@ msgstr ""
 msgid "fun_statistics_msg"
 msgstr ""
 
-msgid "number_programs"
+msgid "highest_level_reached"
 msgstr ""
 
 msgid "highest_quiz_score"
 msgstr ""
 
+msgid "number_programs"
+msgstr ""
+
 msgid "longest_program"
 msgstr ""
 
@@ -353,9 +356,6 @@ msgstr ""
 msgid "last_login"
 msgstr ""
 
-msgid "highest_level_reached"
-msgstr ""
-
 msgid "programs"
 msgstr ""
 
@@ -674,18 +674,15 @@ msgstr ""
 msgid "last_update"
 msgstr ""
 
-msgid "view"
-msgstr ""
-
-msgid "edit"
-msgstr ""
-
 msgid "adventure_prompt"
 msgstr ""
 
 msgid "create_adventure"
 msgstr ""
 
+msgid "download"
+msgstr ""
+
 msgid "teacher_welcome"
 msgstr ""