Move the lower_app_id lookup logic completely in the image_load_icon
method and use it also when looking up the icon from the desktop files
as well as icon themes.
If there are multiple icon themes defined in the config option
'icon-theme' the module will try from left to right to find an icon.
The system default will always be added to this list.
When using additional format options in addition to {icon} the format is
separated into text before and text after the icon. Each of the texts is
displayed in a separate label one before and one after the image for the
icon.
The code updating the labels on changes used the wrong format strings
when updating the label after the icon.
When only the option 'on-click-right' was set and no other 'on-click'
option than the taskbar module wouldn't register for click events and
hence those events were handled by the generic AModule::on-click code.
This code would try to start a shell with the specified command, which
wouldn't make any sense in this circumstances.
The taskbar code falsely checked for the 'on-click-left' option instead
for the 'on-click-right' when deciding to register for click events.
Previously, clicking on the same workspace you were on would throw you
to another workspace if `workspace_auto_back_and_forth yes` was
specified in your sway config. This also fixes workspace output moving
misbehaving and doing the same.
Sway provides the workspace "num" property which is an integer number of
the workspace, i.e., workspace "3" -> 3 and also "3dev" -> "3". This
commit uses this property to sort the workspaces, which makes sense when
persistent workspaces or all-output is specified. This commit also adds
a new configuration option, whether the numeric workspaces come in front
or after workspaces that have non-numeric name.
All workspace buttons that are visible on the same output as the current waybar can be styled with the `current_output` css class.
This is really only useful in combination with the `"all-outputs":
true`. Then the workspaces that are on the current output can be styled
differently than the workspace on other outputs, while all are visible
in the waybar.
