Qt5 built in qwt (#570)

- qt4->qt5
- in built qt5 6.1.5 because rhel7 is not upto date with qt5, removed findqwt.cmake
- made a fix in qwt lib (qwt_plot_layout.h) to work with 5.15 and lower versions for qrect constr.
- qt5 forms fixed, qt4 many hard coding forms switched to forms including qtabwidget, scrolls etc, fonts moved to forms
 - docking option enabled by default, removed option to disable docking feature from "Mode"
- added qVersionResolve utility functions to handle compatibility before and after qt5.12
- qtplots (ian's code) takes in gain mode enable to set some settings within the class, with proper gain plot ticks
- ensure gain plots have no zooming of z axis in 2d and y axis in 1d
- removed placeholder text in qpalette in main window form as its not supportd until 5.12 (so using qt5.9 designer insted of qt5.15 to cope)
- tab order
Servers:
- fixed some error messages that were empty for fail in funcs (mostly minor as if this error, major issues)

libs/qwt-6.1.5/doc/html/class_qwt_panner.js

@@ -0,0 +1,27 @@
+var class_qwt_panner =
+[
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+    [ "~QwtPanner", "class_qwt_panner.html#a19c9b9a08da05649f6d2ef5bf6fb391c", null ],
+    [ "contentsMask", "class_qwt_panner.html#aac1d7537025f41d2d0dfc261c56dac8e", null ],
+    [ "cursor", "class_qwt_panner.html#a1ebb1cc406fa3d30df0e7dd7a541667d", null ],
+    [ "eventFilter", "class_qwt_panner.html#a06b8eea86d4dcbe361c4af41a263f2cb", null ],
+    [ "getAbortKey", "class_qwt_panner.html#abdfca52ea5a6a11a533dcbbbddbb3bf6", null ],
+    [ "getMouseButton", "class_qwt_panner.html#a8a74f8e2f4d424f85fa5a9da11c075d2", null ],
+    [ "grab", "class_qwt_panner.html#ac5ac83293f33b7b71ae9f49217d53fec", null ],
+    [ "isEnabled", "class_qwt_panner.html#a19439f534fc9fa254693948eb4f4bb5f", null ],
+    [ "isOrientationEnabled", "class_qwt_panner.html#aa69c32aae501021f01cb7c833172986c", null ],
+    [ "moved", "class_qwt_panner.html#aa45ae2f4d6d20a83783898dd86d0b595", null ],
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+    [ "paintEvent", "class_qwt_panner.html#acd76ea518bd9267a45115d2c6ce19353", null ],
+    [ "panned", "class_qwt_panner.html#ae9ce78e6f9ae73317af29b2dc5df7372", null ],
+    [ "setAbortKey", "class_qwt_panner.html#acbb1b9e30214354708e1d75db6b78289", null ],
+    [ "setCursor", "class_qwt_panner.html#ac8b0625fe155fff0132df85727f54a3e", null ],
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+    [ "widgetKeyReleaseEvent", "class_qwt_panner.html#a8bd447df4a30299bbc8e6b6d3e2e2f9f", null ],
+    [ "widgetMouseMoveEvent", "class_qwt_panner.html#a6545bc6e25018253c59fc27a48eb948f", null ],
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