**This is for MPV playback backend only!** Since this only works in MPV
for now, the option is not shown if using ExoPlayer.
Adds a setting (the gear icon during playback) to adjust the subtitle
delay.
A negative delay shows subtitles sooner. A positive delay shows them
later. For example, if a subtitle is supposed to show between
1000ms-2000ms, a negative 250ms delay will show it at 750ms-1750ms
instead.
The delay is persisted between plays of the same media & subtitle track.
Ref: #12

Adds a view options button for the TV guide to allow some basic
customization:
* Show details header
* Adjust how channels are sorted
* Toggle color coding for programs
Related to #250Closes#288Fixes#439
Adds an advanced playback setting to enable automatic refresh rate
switching during playback
When enabled, the app looks at the available display modes, chooses the
best candidate, and attempts to switch to it. After playback ends, the
display is switched back to the original mode.
Closes#62Closes#379
Adds a new button implementation which allows for icon buttons to be
circular. Overall the buttons are reduced in size.
Also, the playback controls are are reduced in size, buttons are smaller
and vertical padding is reduced.

Adds a settings allowing for adjusting the thickness of unstyled
subtitle outlines, if outline is enabled.
This is applied for both ExoPlayer & MPV
Closes#179

Dev note: the ExoPlayer implementation is bad code, don't write code
like this. It works though
Allows for setting a per-user profile PIN that must be entered to switch
to the user. The PIN is a sequence of directional buttons, ie D-Pad
left/right/up/down.
This PIN is per device per user per server. The PIN is stored locally
and not sent nor shared with the server. If you forget your PIN, can
still access the app using server credentials which also removes the
PIN.
Additionally, there is another setting to disable automatically sign in.
When enabled (default) the last user is automatically restored, even if
there is a PIN. If disabled, a server & user must always be selected
when opening the app.
Closes#268Closes#321
## Details
Adds options to customize how grid pages are displayed. Every grid page
can be individually customized.
The options are saved per user on the device and restored when
navigating back to the page. The pages that support it have a new button
next to the sort/filter buttons and changes are updated live.
The options are:
* Primary or Thumb image
* Aspect ratio
* Show details header w/ backdrop (similar to the one on the home page)
* Number of columns
* Spacing between cards
* Card image content scale (eg Fit, Fill, Crop, etc)
Note: the Genre tabs' grids cannot be customized yet
### Other changes
- Nav drawer now opens over top of content instead of pushing it
- Images for most cards are fetched with actual fill size
### Possible future work
* Customize Genre grids
* Add more image types, banners?
* Add similar customization options to pages with rows, eg Home page and
Recommended tabs
## Example
For example, this is a movie library using thumb images with 8 columns
and reduced spacing. It also shows the details header
## Issues
Closes#186
Related to #72
## Details
This PR contains a number of optimizations
### Images
Updates to request images with maximum sizes
The max sizes are estimates on the maximum number of pixels that will be
actually displayed. This means the server is downscaling large images
which means 1) better quality downscaling and 2) smaller images sent
over the network and cached
This should mean slightly better quality images and more images that can
be cached locally
### Paging
Reduces network calls when fetching paginated data, ie grid pages and
some rows. This PR combines the total record count & first page queries
which slightly reduces total time to load paginated data.
Additionally, on movies/tv show recommended pages, the rows now only
fetch a limited number of items (same as number on home page). While
they previously fetched using pagination, there is an overhead required
to paginate requests, so this is slightly faster.
### Async recommended fetching
On movies/tv show recommended pages, the rows are now fetched completely
separately from each other. Previously, the rows were requested
separtely, but each was only added to the UI in order as each completed.
Now they will add as the data arrived.
Note: Top unwatched TV shows is still very slow on `10.11.x`, see #204
### Image cache
The local, on-disk image cache size is increased from 100mb to 200mb.
Combined with the smaller images, this covers about 1500-2000 poster
images, but will vary by server.
The cache size is now also configurable in advanced settings from 25mb
to 1000mb. Additionally, you can see how much of both the disk and
memory caches are in use.
## Issues
Closes#330
Related to #120
Adds a toggle to increase the verbosity of the app logs for
release/production builds
Most users won't need to use this, but it can be helpful when [gathering
app
logs](https://github.com/damontecres/Wholphin/wiki/Gathering-app-logs)
to report an issue.
Adds a subtitle style option to set the margin below unstyled subtitles.
This is roughly the percent of the screen below the subtitles. It
applies to both ExoPlayer & MPV.
Also fixes font & background opacity not being applied in some cases.
Fixes#225Closes#178