[gtk3] Invalid shortcuts

[egmontkob]

Some lines from guake/data/org.guake.gschema.xml:

    <key name="move-tab-left" type="s">
        <default>'&lt;Control&gt;Shift&gt;Page_Up'</default>

    <key name="move-tab-right" type="s">
        <default>'&lt;Control&gt;Shift&gt;Page_Down'</default>

    <key name="increase-transparency" type="s">
        <default>'&lt;Control&gt;Shift&gt;Up'</default>

    <key name="decrease-transparency" type="s">
        <default>'&lt;Control&gt;Shift&gt;Down'</default>

    <key name="toggle-transparency" type="s">
        <default>'&lt;Control&gt;Alt&gt;T'</default>

Note how < and > are unbalanced, the opening < is missing from the second modifier.

[egmontkob]

Interestingly, "Increase transparency" and "Decrease transparency" initially show up as "Disabled" in the keyboard shortcut editor, but if I modify them to their intended default then they're shown as "Invalid" instead.

"Increase/Decrease height" are presented as "Invalid" initially.

[gsemet]

oh, nice catch. i does the fix the other exception with modifier, unfortunately