Update po/he.po

Update Hebrew translator
Update of Hebrew translation
Merge pull request #95 from YosefOr/patch-7

Update Hebrew translator
Early NEWS update
Detect SCons configuration files as Python

SCons configuration files are plain Python, just without the .py
extension.
Ignore more build files
Add missing D keywords

Closes #3595187.
Print filename of failed plugin
Adding first version of Hindi translation
Update of Finnish translation
Added first version of Serbian translation
Replace ru_RU with simple ru inside credantials as we only have one Russiian translation
Update of Swedish translation
Update of German translation
Extend i18n-section of NEWS a bit
Fix not using monospace font for unmatched search entries

This bug was introduced by RC file switch.
Allow user gtkrc to override our gtkrc styles

This allows the user to override the custom styles we apply to some
widgets, like e.g. the unmatched search entry colors.

We use the :theme priority rather than the :application one because
it seems that the :application one cannot override theme settings, even
if it matches against a name the theme don't have rules for but have
rules for the class of that widget.  This prevents a theme from
overriding our styles, but it's unlikely a theme actually provide some
specific stuff for us anyway.
Move document status color definition to the gtkrc file

This allows for users to change the colors if needed (may be useful
with some themes or color blind persons).

On the sidebar, only the color is applied for now.  This is because
it is not possible to style cell renderers through RC files, all having
to be done in the code;  so currently only the color is applied.
Merge branch 'master' into gtk3-support
Port new configurable document status colors to GTK3