Adds history of past searches.

Implements drag and drop to load files.

Add a default font to avoid a bug on first use when no font has been
selected.

Fix the 'apply' command in both option dialogs.

Correct the console to only appear in debug on windows.

Add missing image files.

Add watching file on disk and notification when it's changed.

Clean up the mechanism to create new searches and remove the old ones.

Add the toolbar, it reports file name/size. Add (broken) reload action.

Shorten the hash in About box.

Minor typo correction.

Merge branch 'bullets'

Conflicts:
abstractlogview.cpp

Hardcode a sensible selection of colors.

Add colors filtering in the drawing function.

Add serialization of FilterSet to the settings.

Filter box now functional.

Add the filters to the global configuration.

First implementation of the Filters box.

Correction: now clears the bottom view when loading a new file.

LogFilteredData now use a faster bisection method to find lines.

Add script to generate test logs.

Add perf script to analize log files.

Implement the white/red bullets.

Move maxLength code to the leaf classes, making AbstractLogData a pure
interface.

Don't scroll the screen when a line selected in the bottom view is on
screen.