Support for account toggeling

By clicking on a “Bank” it is now possible to toggle view of all
accounts.
Fix for #336 - show all account types @ avanza
Toggle will only activate on longpress,

to keep old functionality of click
Code cleanup
Added menu item for hide all accounts
New certificate for CSN. Fixes #346.
Merge pull request #347 from auno/346-csn-certificate-not-trusted

New certificate for CSN
New certificate for EasyCard. Fixes #350
New certificate for Meniga. Fixes #351
New certificate for Brummer KF. Fixes #349
New certificate for Ica
Removes outdated certificate for PayPal
Rename new certificate for PayPal
New certificate for PlusGirot. Fixes #359
Removes outdated certificate for ICABanken
Rename current certificate for ICABanken
New certificate for FirstCard. Fixes #362
New certificate for Nordea DK. Fixes #364
New certificate for Jojo. Fixes #366
Adds troubleshooting instructions to README