Initial work on downloading cards through fallback URLs.
This change will add in the ability to proceed to the next URL
should the first one fail. First trial shows that it's working,
but needs more refinement.
Return a list instead of a single url. This is the start
of getting many possible urls instead of one. Functionally
identical except that the primary url will be attempted for
cards without a muid.
## Related Ticket(s)
- Fixes#3314
## Short roundup of the initial problem
When the view was sorted in the manage sets window, the "Enable/Disable All" buttons never toggled to "Enable/Disable selected" buttons, even when more sets were selected.
## What will change with this Pull Request?
- Selected sets can be enabled/disabled in sorted view as well
* version updates
- qt to 5.11.x
- openssl to 1.0.2o
- protobuf to 3.6
* undo protobuf change
* reapply with proper semver
* only qt latest
* combined env, protobuf 3.6
* slim build matrix config down
* fix env
* test
* fix env -eq
* test if script changes work
* /2
* enable cache again
* fix
* final
## Short roundup of the initial problem
It was mostly out of date because we have to manually update it with our current version number.
The use of that is suspect anyway, since it only displays in the appveyor build overview.
It also had a redundant info about the branch.
## What will change with this Pull Request?
- remove hard coded version number
- remove branch
- cleanup build trigger from [#3300](https://github.com/Cockatrice/Cockatrice/pull/3300/files#diff-11c909939117928998b102a1fff7d363)
- more readable style
## Screenshots
I did some tests, so don't be confused about the different styles displayed in the history:
<!-- simply drag & drop image files directly into this description! -->
* search field added; sortfilterproxy displayed in treeview
* searching works properly
* moving with filter on works; view isnt't updated yet
* clangify & view updating figured out
* moving disabled when sorting is active
* drag&drop disabled when view sorted
* clangified
* foreach replaced
* button rename & SORT_RESET defined
* changed variable names
* 'x' button added & searchlabel text modified
* 'enabled' column won't grow anymore
* column resize improvement
* button hint & restore original order added
* moving with filter on works; view isnt't updated yet
* sort disable build in column headers (3 clicks)
* codacy fix
* typo + wording
* background color for warning
* buttons moved down a bit
* clicking "default order" button will hide the warning text
## Related Ticket(s)
- Fixes#3212
## What will change with this Pull Request?
- `0` input on power/toughness filters will only return `0` values
- `relationCheck` method will only get called after simple string comparison failed
- due to their similar structure `acceptPower` and `acceptToughness` methods has been merged
## What will change with this Pull Request?
- cleanup of empty and unused languages files (catalan, lithuanian, hebrew, ukrainian)
- reflect language removing on transifex
