rotate images based on exif information

Closes #1847
Enabled audio and video drafts
All slide types do have an "image", changing the check order enables audio and video drafts.
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Merge pull request #2218 from McLoo/fix_av_draft_2

Enabled audio and video drafts
memory-friendly resize for circle cropping

Fixes #2224
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Merge pull request #2227 from mcginty/circle-crop-oom

memory-friendly resize for circle cropping
remove double rotation of group avatars

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Catch issues with bad MMSC URIs, add validation

Fixes #2202
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Replace button text to cancel TS registration
in RegistrationActivity from "skip" to "cancel", when coming from the reminder

Closes #2219
Merge pull request #2230 from mcginty/manual-mms-pref-validation

Catch issues with bad MMSC URIs, add validation
Pass recipient ids, not recipient objects

Fixes #2233
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Include group titles in search

When searching for messages only simple threads matching the
contact names are returned as search results. With this commit
also group converstations where the group title matches the search
term are displayed in the result. This makes search results more
consistent with the conversation list as now all conversation
titles (i.e. contact names and group titles) are searched through.

Fixes #1954
Closes #2216
More l10n - for decrypting errors

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Closes #2231
Fix build.

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properly update transport options location

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fix bithub payment link and image
use PartAuthority when fetching part streams
resolves the self-send case

Fixes #2259
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Merge pull request #2264 from mcginty/write-part-data-fix

use PartAuthority when fetching part streams
thumbnail generation and disk caching

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fix recipient handling for media preview

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replace unlocalized 'at' in message details date

Making this a string resource has the potential for crashes.
Leaving it out completely is a little confusing.
The dash is the perfect solution - until a better date formatter is used.
Closes #2215