Fix redraw problems in preview frames and debug panel

The problem was that direct call of RefreshView (now DrawView) doesn't
generate EVT_PAINT (at least on GNU/Linux with Wayland and wxgtk build
with gtk3+ support).
Now RefreshView simply triggers EVT_PAINT and EVT_PAINT handler does actual work.

     1

[TOPOLOGY]

     2

NetName=None

     3

Nodes=0x01

     4

Node64Present=0x01

     5

Node64Name=micromod

     6

Node64DCFName=PEAK MicroMod.eds

     7

EDSBaseName=eds