chore: Make icon installations dynamic in the Makefile

Some new icons color set for the systray applet will be added soon and we are planning to make additional users contributed colors as easy as possible to implement.
Adoption a more "dynamic" way to install icons in the Makefile will avoid having to modify it each time a new icons color set is added.

Makefile

@@ -15,8 +15,8 @@ install:
 	install -Dm 755 src/lib/* -t "${DESTDIR}${PREFIX}/share/${pkgname}/lib/"
 
 	# Install icons
-	install -Dm 664 "src/icons/${pkgname}.svg" "${DESTDIR}${PREFIX}/share/icons/hicolor/scalable/apps/${pkgname}.svg"
-	install -Dm 664 "src/icons/${pkgname}_updates-available.svg" "${DESTDIR}${PREFIX}/share/icons/hicolor/scalable/apps/${pkgname}_updates-available.svg"
+	install -Dm 664 "src/icons/${pkgname}*.svg" -t "${DESTDIR}${PREFIX}/share/icons/hicolor/scalable/apps/"
+	install -Dm 664 "src/icons/${pkgname}_updates-available*.svg" -t "${DESTDIR}${PREFIX}/share/icons/hicolor/scalable/apps/"
 
 	# Install .desktop files
 	install -Dm 644 "res/desktop/${pkgname}.desktop" "${DESTDIR}${PREFIX}/share/applications/${pkgname}.desktop"
@@ -62,11 +62,11 @@ uninstall:
 	rm -f "${DESTDIR}${PREFIX}/bin/${pkgname}"
 
 	# Delete data folder (which stores libraries)
-	rm -rf "${DESTDIR}${PREFIX}/share/${pkgname}"
+	rm -rf "${DESTDIR}${PREFIX}/share/${pkgname}/"
 
 	# Delete icons
-	rm -rf "${DESTDIR}${PREFIX}/share/icons/hicolor/scalable/apps/${pkgname}.svg"
-	rm -rf "${DESTDIR}${PREFIX}/share/icons/hicolor/scalable/apps/${pkgname}_updates-available.svg"
+	rm -f "${DESTDIR}${PREFIX}/share/icons/hicolor/scalable/apps/${pkgname}*.svg"
+	rm -f "${DESTDIR}${PREFIX}/share/icons/hicolor/scalable/apps/${pkgname}_updates-available*.svg"
 
 	# Delete .desktop files
 	rm -f "${DESTDIR}${PREFIX}/share/applications/${pkgname}.desktop"