[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
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
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] Fix jolla icon for existing tutorial bookmark