[sailfish-browser] Notify memory pressure

Requires: https://github.com/tmeshkova/qtmozembed/pull/76
Update qtmozembed requires field
Merge pull request #140 from rainemak/memoryPressure

[sailfish-browser] Notify memory pressure
[sailfish-browser] bookmark editing

use enterkey to accept/jump, don't allow empty urls, show url instead of empty title

make landscape scrollable, inputhints for url field
Merge pull request #138 from veskuh/edit-bookmarks

[sailfish-browser] bookmark editing
[sailfish-browser] Enable usage of stored basic auth credentials
[sailfish-browser] Make the dontsave switch in auth dialogs always visible
Merge pull request #142 from rojkov/save-basic-auth

[sailfish-browser] Enable usage of stored basic auth credentials
[sailfish-browser] Open filepicker also for multifile requests
Add debug mode for browser

Browser can be launched with -debugMode argument. When launching
in debug mode an overlay is drawn on top web content.

Currently debug mode only contains content height, content width,
scale, and a button for dumping memory snapshot.

Requires: https://github.com/tmeshkova/embedlite-components/pull/56
Add command line argument for dumping memory info
Coding style improvements
just take compiler flags from libxul-embedding
Add simple memory-dump-reader utility
Merge pull request #143 from rainemak/debugMode

Add command line debug mode support for browser
Merge pull request #144 from rainemak/memory-dump-reader

Add simple memory-dump-reader utility
Update embedlite-components-qt5 required version
[sailfish-browser] Update toolbar to the new design

This doesn't contain yet double height toolbar for portrait
orientation. Double height toolbar will show title and url
for user while page is loading.

Toolbar is now animated with discrete y transition instead
of opacity animation. Logic is the same as it was previous
except the gesture threshold is cut to half.

Requires: https://github.com/tmeshkova/qtmozembed/pull/75
[sailfish-browser] Fix jolla icon for existing tutorial bookmark
Add bookmark.json to the project file