Follow project coding style. Issue #2192.
Images cache control code edit
Follow project coding style. Issue #2192.
Add higest and lowest priority icons into toolbar
Ignore .!qB when extracting file extensions
Hide priority menu items when queueing is disabled
Follow project coding style. Issue #2192.
Update torrent list after operations with torrents.

Immediately update torrent list after some operations with torrents.
Such as changing priority, adding torrent, pause/resume, etc.
Save torrent list sort order in local storage
Restore selected filter on page load
Follow project coding style. Issue #2192.
Add sequential downloading menu items
Dynamically show 'Start' and 'Pause' menu items
Add space before priority menu item
Merge pull request #2268 from pmzqla/file-ext

Ignore .!qB when extracting file extensions
Merge pull request #2254 from buinsky/master

WebUI: Some changes
WebUI: Translate page title everywhere
WebUI: Select username on login page load

On logout, the input field is not empty. Select its content.
WebUI: Center progressbars in trasferlist
WebUI: Make column width less variable in transferlist

Each column has a fixed width that allows to read its content.
The column for the name of the torrents has a variable width with an
upper and a lower constraint.

If the width of the page is not sufficient to fit the table, a scrollbar
will appear.