Add a tool tip with meta data behind a button on each novel tree item

novelwriter/assets/icons/typicons_dark/icons.conf

@@ -88,3 +88,4 @@ deco_doc_h1     = nw_deco-h1.svg
 deco_doc_h2     = nw_deco-h2.svg
 deco_doc_h3     = nw_deco-h3.svg
 deco_doc_h4     = nw_deco-h4.svg
+deco_doc_more   = nw_deco-noveltree-more.svg

novelwriter/assets/icons/typicons_dark/nw_deco-noveltree-more.svg

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   version="1.2"
+   width="24"
+   height="24"
+   viewBox="0 0 24 24"
+   id="svg2161"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:dc="http://purl.org/dc/elements/1.1/">
+  <metadata
+     id="metadata2167">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs2165" />
+  <path
+     d="M 9.7,18.2 16,12 9.7,5.8 C 9.5,5.6 9.2,5.5 9,5.5 8.8,5.5 8.5,5.6 8.3,5.8 8.1,6 8,6.2 8,6.5 v 11 c 0,0.3 0.1,0.5 0.3,0.7 0.2,0.2 0.5,0.3 0.7,0.3 0.2,0 0.5,-0.1 0.7,-0.3 z"
+     id="path3096"
+     style="fill:#848484;fill-opacity:1" />
+</svg>

novelwriter/assets/icons/typicons_light/icons.conf

@@ -88,3 +88,4 @@ deco_doc_h1     = nw_deco-h1.svg
 deco_doc_h2     = nw_deco-h2.svg
 deco_doc_h3     = nw_deco-h3.svg
 deco_doc_h4     = nw_deco-h4.svg
+deco_doc_more   = nw_deco-noveltree-more.svg

novelwriter/assets/icons/typicons_light/nw_deco-noveltree-more.svg

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   version="1.2"
+   width="24"
+   height="24"
+   viewBox="0 0 24 24"
+   id="svg2161"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:dc="http://purl.org/dc/elements/1.1/">
+  <metadata
+     id="metadata2167">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs2165" />
+  <path
+     d="M 9.7,18.2 16,12 9.7,5.8 C 9.5,5.6 9.2,5.5 9,5.5 8.8,5.5 8.5,5.6 8.3,5.8 8.1,6 8,6.2 8,6.5 v 11 c 0,0.3 0.1,0.5 0.3,0.7 0.2,0.2 0.5,0.3 0.7,0.3 0.2,0 0.5,-0.1 0.7,-0.3 z"
+     id="path3096"
+     style="fill:#848484;fill-opacity:1" />
+</svg>