feat: Change name of Preferences > Filters > Tabs and move them to Account Preferences(#3536) (#4115)

# Overview
In the previous code, when you open preferences, there is a section
headed "Filters" with a section called "Tabs"

This is confusing.

# Changes
- Change the section title from "Filters" to "Per-timeline preferences."
- Change the current "Tabs" section to "Home timeline" since it is only
for home timelines

# Screenshots
account preference screen | detail screen
:--: | :--:
|<image
src="https://github.com/tuskyapp/Tusky/assets/62137820/12694f24-b7e3-4ba3-90f5-53740e9c4269"
width="250" />|<image
src="https://github.com/tuskyapp/Tusky/assets/62137820/796e9ac1-76d6-43ef-a087-a1cd2d899ef8"
width="250" />

# Note
- Maybe string resources should have a new property? (for translation)

# Related link
 Fixes #3536

---------

Co-authored-by: mcc <andi.m.mcclure@gmail.com>

app/src/main/res/values/strings.xml

@@ -298,6 +298,7 @@
     <string name="pref_title_app_theme">App theme</string>
     <string name="pref_title_timelines">Timelines</string>
     <string name="pref_title_timeline_filters">Filters</string>
+    <string name="pref_title_per_timeline_preferences">Per-timeline preferences</string>
 
     <string name="app_them_dark">Dark</string>
     <string name="app_theme_light">Light</string>
@@ -316,7 +317,7 @@
     <string name="pref_title_animate_custom_emojis">Animate custom emojis</string>
 
     <string name="pref_title_post_filter">Timeline filtering</string>
-    <string name="pref_title_post_tabs">Tabs</string>
+    <string name="pref_title_post_tabs">Home timeline</string>
     <string name="pref_title_show_boosts">Show boosts</string>
     <string name="pref_title_show_replies">Show replies</string>
     <string name="pref_title_show_media_preview">Download media previews</string>