Tests Fix,Schemes Sorting,Language Sorting

- Tests Fix for 3 DeprecationWarning
- Schemes Sorting and Alternating Row Colors
- Language Sorting and Alternating Row Colors
- Schemes can find upper case schemes, eg File.COLOR
- Language can find upper case language, eg File.QM
- Use with open(file) as f instead of just open(file) on dialogs
- A la grande le puse cuca
- Dont break Traceback text by line wrap
- Add GPL Licence notice where missing
- Dont need to import SIGNAL anymore on dialogs
SIGNAL is back
Just one more was missing SIGNAL
Ninja Editor Checkers with updates in explorer tabs lists complete
loading migration list from migration checker
Merge pull request #1480 from diegosarmentero/master

Ninja Editor Checkers with updates in explorer tabs lists complete
Merge pull request #1476 from juancarlospaco/master

Tests Fix,Schemes Sorting,Language Sorting
QTableWidget with Checkable Header to select all Items
Update ninja_dark.qss
Fixes from Peer Review,Table Search by query string
Kill Table Search by query string
Merge pull request #1484 from juancarlospaco/master

QTableWidget with Checkable Header